diff --git a/Robust.Client/GameObjects/ClientEntityManager.Spawn.cs b/Robust.Client/GameObjects/ClientEntityManager.Spawn.cs
index 46a97463b6b..a86fc19859e 100644
--- a/Robust.Client/GameObjects/ClientEntityManager.Spawn.cs
+++ b/Robust.Client/GameObjects/ClientEntityManager.Spawn.cs
@@ -76,6 +76,33 @@ public override bool PredictedTrySpawnInContainer(
         return true;
     }
 
+    public override bool PredictedTrySpawnInContainer(
+        string? protoName,
+        BaseContainer container,
+        [NotNullWhen(true)] out EntityUid? uid,
+        ComponentRegistry? overrides = null)
+    {
+        if (!TrySpawnInContainer(protoName, container, out uid, overrides))
+            return false;
+
+        FlagPredicted(uid.Value);
+        return true;
+    }
+
+    public override bool PredictedTrySpawnInContainer(
+        string? protoName,
+        BaseContainer container,
+        [NotNullWhen(true)] out EntityUid? uid,
+        EntityUid? mapUid,
+        ComponentRegistry? overrides = null)
+    {
+        if (!TrySpawnInContainer(protoName, container, out uid, mapUid, overrides))
+            return false;
+
+        FlagPredicted(uid.Value);
+        return true;
+    }
+
     public override EntityUid PredictedSpawnNextToOrDrop(string? protoName, EntityUid target, TransformComponent? xform = null, ComponentRegistry? overrides = null)
     {
         var ent = SpawnNextToOrDrop(protoName, target, xform, overrides);
@@ -117,6 +144,38 @@ public override EntityUid PredictedSpawnInContainerOrDrop(
         return ent;
     }
 
+    public override EntityUid PredictedSpawnInContainerOrDrop(
+        string? protoName,
+        BaseContainer container,
+        TransformComponent? xform = null,
+        ContainerManagerComponent? containerComp = null,
+        ComponentRegistry? overrides = null)
+    {
+        var ent = SpawnInContainerOrDrop(protoName, container, xform, containerComp, overrides);
+
+        FlagPredicted(ent);
+        return ent;
+    }
+
+    public override EntityUid PredictedSpawnInContainerOrDrop(
+        string? protoName,
+        BaseContainer container,
+        out bool inserted,
+        TransformComponent? xform = null,
+        ContainerManagerComponent? containerComp = null,
+        ComponentRegistry? overrides = null)
+    {
+        var ent = SpawnInContainerOrDrop(protoName,
+            container,
+            out inserted,
+            xform,
+            containerComp,
+            overrides);
+
+        FlagPredicted(ent);
+        return ent;
+    }
+
     public override void FlagPredicted(Entity<MetaDataComponent?> ent)
     {
         if (!MetaQuery.Resolve(ent.Owner, ref ent.Comp))
diff --git a/Robust.Shared/Containers/SharedContainerSystem.Insert.cs b/Robust.Shared/Containers/SharedContainerSystem.Insert.cs
index caf462d85e2..639ca56a61e 100644
--- a/Robust.Shared/Containers/SharedContainerSystem.Insert.cs
+++ b/Robust.Shared/Containers/SharedContainerSystem.Insert.cs
@@ -136,6 +136,17 @@ public bool Insert(Entity<TransformComponent?, MetaDataComponent?, PhysicsCompon
         return true;
     }
 
+    /// <inheritdoc cref="InsertOrDrop(Entity{TransformComponent?,MetaDataComponent?,PhysicsComponent?},BaseContainer,TransformComponent?)"/>
+    public bool InsertOrDrop(Entity<ContainerManagerComponent?, TransformComponent?> container, Entity<TransformComponent?, MetaDataComponent?, PhysicsComponent?> toInsert,
+        string containerId)
+    {
+        if (TryGetContainer(container, containerId, out var baseContainer, container))
+            return InsertOrDrop(toInsert, baseContainer, container.Comp2);
+
+        _transform.DropNextTo(toInsert, (container.Owner, container.Comp2));
+        return false;
+    }
+
     /// <summary>
     /// Attempts to insert an entity into a container. If it fails, it will instead drop the entity next to the
     /// container entity.
diff --git a/Robust.Shared/GameObjects/EntityManager.Spawn.cs b/Robust.Shared/GameObjects/EntityManager.Spawn.cs
index 046cf3deab5..70679035d82 100644
--- a/Robust.Shared/GameObjects/EntityManager.Spawn.cs
+++ b/Robust.Shared/GameObjects/EntityManager.Spawn.cs
@@ -7,7 +7,6 @@
 using Robust.Shared.Collections;
 using Robust.Shared.Containers;
 using Robust.Shared.Maths;
-using Robust.Shared.Serialization;
 
 namespace Robust.Shared.GameObjects;
 
@@ -145,20 +144,11 @@ public bool TrySpawnNextTo(
         if (!xform.ParentUid.IsValid())
             return false;
 
-        if (!_containers.TryGetContainingContainer(target, out var container))
-        {
-            uid = SpawnNextToOrDrop(protoName, target, xform, overrides);
-            return true;
-        }
-
-        var doMapInit = _mapSystem.IsInitialized(xform.MapUid);
-        uid = Spawn(protoName, overrides, doMapInit);
-        if (_containers.Insert(uid.Value, container))
-            return true;
+        if (_containers.TryGetContainingContainer(target, out var container))
+            return TrySpawnInContainer(protoName, container, out uid, xform.MapUid, overrides);
 
-        DeleteEntity(uid.Value);
-        uid = null;
-        return false;
+        uid = SpawnNextToOrDrop(protoName, target, xform, overrides);
+        return true;
     }
 
     public bool TrySpawnInContainer(
@@ -170,21 +160,45 @@ public bool TrySpawnInContainer(
         ComponentRegistry? overrides = null)
     {
         uid = null;
-        if (containerComp == null && !TryGetComponent(containerUid, out containerComp))
-            return false;
+        return _containers.TryGetContainer(containerUid, containerId, out var container, containerComp)
+               && TrySpawnInContainer(protoName, container, out uid, overrides);
+    }
 
-        if (!containerComp.Containers.TryGetValue(containerId, out var container))
-            return false;
+    public bool TrySpawnInContainer(
+        string? protoName,
+        BaseContainer container,
+        [NotNullWhen(true)] out EntityUid? uid,
+        ComponentRegistry? overrides = null)
+    {
+        return TrySpawnInContainer(protoName, container, out uid, TransformQuery.Comp(container.Owner).MapUid, overrides);
+    }
 
-        var doMapInit = _mapSystem.IsInitialized(TransformQuery.GetComponent(containerUid).MapUid);
-        uid = Spawn(protoName, overrides, doMapInit);
+    /// <summary>
+    /// Attempts to spawn an entity prototype in a container then initialize it once it has been successfully inserted into the container.
+    /// Deletes the entity if it fails to insert.
+    /// </summary>
+    /// <returns>True if entity was spawned and inserted successfully</returns>
+    public bool TrySpawnInContainer(
+        string? protoName,
+        BaseContainer container,
+        [NotNullWhen(true)] out EntityUid? uid,
+        EntityUid? mapUid,
+        ComponentRegistry? overrides = null)
+    {
+        uid = CreateEntityUninitialized(protoName, out var meta, overrides);
+        InitializeAndStartEntity((uid.Value, meta), doMapInit: false);
 
-        if (_containers.Insert(uid.Value, container))
-            return true;
+        if (!_containers.Insert(uid.Value, container))
+        {
+            DeleteEntity(uid);
+            uid = null;
+            return false;
+        }
 
-        DeleteEntity(uid.Value);
-        uid = null;
-        return false;
+        if (_mapSystem.IsInitialized(mapUid))
+            RunMapInit(uid.Value, meta);
+
+        return true;
     }
 
     public EntityUid SpawnNextToOrDrop(string? protoName, EntityUid target, TransformComponent? xform = null, ComponentRegistry? overrides = null)
@@ -193,9 +207,13 @@ public EntityUid SpawnNextToOrDrop(string? protoName, EntityUid target, Transfor
         if (!xform.ParentUid.IsValid())
             return Spawn(protoName);
 
-        var doMapInit = _mapSystem.IsInitialized(xform.MapUid);
-        var uid = Spawn(protoName, overrides, doMapInit);
+        var uid = CreateEntityUninitialized(protoName, out var meta, overrides);
+        InitializeAndStartEntity((uid, meta), doMapInit: false);
         _xforms.DropNextTo(uid, target);
+
+        if (_mapSystem.IsInitialized(xform.MapUid))
+            RunMapInit(uid, meta);
+
         return uid;
     }
 
@@ -219,19 +237,43 @@ public EntityUid SpawnInContainerOrDrop(
         ContainerManagerComponent? containerComp = null,
         ComponentRegistry? overrides = null)
     {
-        inserted = true;
-        xform ??= TransformQuery.GetComponent(containerUid);
-        var doMapInit = _mapSystem.IsInitialized(xform.MapUid);
-        var uid = Spawn(protoName, overrides, doMapInit);
+        xform ??= TransformQuery.Comp(containerUid);
+        var uid = CreateEntityUninitialized(protoName, out var meta, overrides);
+        InitializeAndStartEntity((uid, meta), doMapInit: false);
 
-        if ((containerComp == null && !TryGetComponent(containerUid, out containerComp))
-             || !containerComp.Containers.TryGetValue(containerId, out var container)
-             || !_containers.Insert(uid, container))
-        {
-            inserted = false;
-            if (xform.ParentUid.IsValid())
-                _xforms.DropNextTo(uid, (containerUid, xform));
-        }
+        inserted = _containers.InsertOrDrop((containerUid, containerComp, xform), uid, containerId);
+
+        if (_mapSystem.IsInitialized(xform.MapUid))
+            RunMapInit(uid, meta);
+
+        return uid;
+    }
+
+    public EntityUid SpawnInContainerOrDrop(
+        string? protoName,
+        BaseContainer container,
+        TransformComponent? xform = null,
+        ContainerManagerComponent? containerComp = null,
+        ComponentRegistry? overrides = null)
+    {
+        return SpawnInContainerOrDrop(protoName, container, out _, xform, containerComp, overrides);
+    }
+
+    public EntityUid SpawnInContainerOrDrop(
+        string? protoName,
+        BaseContainer container,
+        out bool inserted,
+        TransformComponent? xform = null,
+        ContainerManagerComponent? containerComp = null,
+        ComponentRegistry? overrides = null)
+    {
+        xform ??= TransformQuery.Comp(container.Owner);
+        var uid = CreateEntityUninitialized(protoName, out var meta, overrides);
+        InitializeAndStartEntity((uid, meta), doMapInit: false);
+
+        inserted = _containers.InsertOrDrop(uid, container);
+        if (_mapSystem.IsInitialized(xform.MapUid))
+            RunMapInit(uid, meta);
 
         return uid;
     }
@@ -284,6 +326,25 @@ public virtual bool PredictedTrySpawnInContainer(
         return TrySpawnInContainer(protoName, containerUid, containerId, out uid, containerComp, overrides);
     }
 
+    public virtual bool PredictedTrySpawnInContainer(
+        string? protoName,
+        BaseContainer container,
+        [NotNullWhen(true)] out EntityUid? uid,
+        ComponentRegistry? overrides = null)
+    {
+        return TrySpawnInContainer(protoName, container, out uid, overrides);
+    }
+
+    public virtual bool PredictedTrySpawnInContainer(
+        string? protoName,
+        BaseContainer container,
+        [NotNullWhen(true)] out EntityUid? uid,
+        EntityUid? mapUid,
+        ComponentRegistry? overrides = null)
+    {
+        return TrySpawnInContainer(protoName, container, out uid, mapUid, overrides);
+    }
+
     public virtual EntityUid PredictedSpawnNextToOrDrop(string? protoName, EntityUid target, TransformComponent? xform = null, ComponentRegistry? overrides = null)
     {
         return SpawnNextToOrDrop(protoName, target, xform, overrides);
@@ -318,6 +379,32 @@ public virtual EntityUid PredictedSpawnInContainerOrDrop(
             overrides);
     }
 
+    public virtual EntityUid PredictedSpawnInContainerOrDrop(
+        string? protoName,
+        BaseContainer container,
+        TransformComponent? xform = null,
+        ContainerManagerComponent? containerComp = null,
+        ComponentRegistry? overrides = null)
+    {
+        return SpawnInContainerOrDrop(protoName, container, xform, containerComp, overrides);
+    }
+
+    public virtual EntityUid PredictedSpawnInContainerOrDrop(
+        string? protoName,
+        BaseContainer container,
+        out bool inserted,
+        TransformComponent? xform = null,
+        ContainerManagerComponent? containerComp = null,
+        ComponentRegistry? overrides = null)
+    {
+        return SpawnInContainerOrDrop(protoName,
+            container,
+            out inserted,
+            xform,
+            containerComp,
+            overrides);
+    }
+
     /// <summary>
     /// Flags an entity as being a predicted spawn and should be deleted when its corresponding tick comes in.
     /// </summary>
diff --git a/Robust.Shared/GameObjects/EntitySystem.Proxy.cs b/Robust.Shared/GameObjects/EntitySystem.Proxy.cs
index 8a8c7d380f6..ec9760661e8 100644
--- a/Robust.Shared/GameObjects/EntitySystem.Proxy.cs
+++ b/Robust.Shared/GameObjects/EntitySystem.Proxy.cs
@@ -1004,7 +1004,7 @@ protected EntityUid SpawnAttachedTo(string? prototype, EntityCoordinates coordin
     protected EntityUid SpawnAtPosition(string? prototype, EntityCoordinates coordinates, ComponentRegistry? overrides = null)
         => EntityManager.SpawnAtPosition(prototype, coordinates, overrides);
 
-    /// <inheritdoc cref="IEntityManager.TrySpawnInContainer" />
+    /// <inheritdoc cref="IEntityManager.TrySpawnInContainer(string?,EntityUid,string,out EntityUid?,ContainerManagerComponent?,ComponentRegistry?)" />
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     [ProxyFor(typeof(EntityManager))]
     protected bool TrySpawnInContainer(
@@ -1018,6 +1018,18 @@ protected bool TrySpawnInContainer(
         return EntityManager.TrySpawnInContainer(protoName, containerUid, containerId, out uid, containerComp, overrides);
     }
 
+    /// <inheritdoc cref="IEntityManager.TrySpawnInContainer(string?,BaseContainer,out EntityUid?,ComponentRegistry?)" />
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected bool TrySpawnInContainer(
+        string? protoName,
+        BaseContainer container,
+        [NotNullWhen(true)] out EntityUid? uid,
+        ContainerManagerComponent? containerComp = null,
+        ComponentRegistry? overrides = null)
+    {
+        return EntityManager.TrySpawnInContainer(protoName, container, out uid, overrides);
+    }
+
     /// <inheritdoc cref="IEntityManager.TrySpawnNextTo" />
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     [ProxyFor(typeof(EntityManager))]
@@ -1043,7 +1055,7 @@ protected EntityUid SpawnNextToOrDrop(
         return EntityManager.SpawnNextToOrDrop(protoName, target, xform, overrides);
     }
 
-    /// <inheritdoc cref="IEntityManager.SpawnInContainerOrDrop" />
+    /// <inheritdoc cref="IEntityManager.SpawnInContainerOrDrop(string?,EntityUid,string,TransformComponent?,ContainerManagerComponent?,ComponentRegistry?)" />
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     [ProxyFor(typeof(EntityManager))]
     protected EntityUid SpawnInContainerOrDrop(
@@ -1057,6 +1069,18 @@ protected EntityUid SpawnInContainerOrDrop(
         return EntityManager.SpawnInContainerOrDrop(protoName, containerUid, containerId, xform, container, overrides);
     }
 
+    /// <inheritdoc cref="IEntityManager.SpawnInContainerOrDrop(string?,BaseContainer,TransformComponent?,ContainerManagerComponent?,ComponentRegistry?)" />
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected EntityUid SpawnInContainerOrDrop(
+        string? protoName,
+        BaseContainer baseContainer,
+        TransformComponent? xform = null,
+        ContainerManagerComponent? container = null,
+        ComponentRegistry? overrides = null)
+    {
+        return EntityManager.SpawnInContainerOrDrop(protoName, baseContainer, xform, container, overrides);
+    }
+
     #endregion
 
     #region PredictedSpawning
@@ -1079,7 +1103,7 @@ protected EntityUid PredictedSpawnAttachedTo(string? prototype, EntityCoordinate
     protected EntityUid PredictedSpawnAtPosition(string? prototype, EntityCoordinates coordinates, ComponentRegistry? overrides = null)
         => EntityManager.PredictedSpawnAtPosition(prototype, coordinates, overrides);
 
-    /// <inheritdoc cref="IEntityManager.TrySpawnInContainer" />
+    /// <inheritdoc cref="IEntityManager.TrySpawnInContainer(string?,EntityUid,string,out EntityUid?,ContainerManagerComponent?,ComponentRegistry?)" />
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     [ProxyFor(typeof(EntityManager))]
     protected bool PredictedTrySpawnInContainer(
@@ -1093,6 +1117,29 @@ protected bool PredictedTrySpawnInContainer(
         return EntityManager.PredictedTrySpawnInContainer(protoName, containerUid, containerId, out uid, containerComp, overrides);
     }
 
+    /// <inheritdoc cref="IEntityManager.TrySpawnInContainer(string?,EntityUid,string,out EntityUid?,ContainerManagerComponent?,ComponentRegistry?)" />
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected bool PredictedTrySpawnInContainer(
+        string? protoName,
+        BaseContainer container,
+        [NotNullWhen(true)] out EntityUid? uid,
+        ComponentRegistry? overrides = null)
+    {
+        return EntityManager.PredictedTrySpawnInContainer(protoName, container, out uid, overrides);
+    }
+
+    /// <inheritdoc cref="IEntityManager.TrySpawnInContainer(string?,EntityUid,string,out EntityUid?,ContainerManagerComponent?,ComponentRegistry?)" />
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected bool PredictedTrySpawnInContainer(
+        string? protoName,
+        BaseContainer container,
+        [NotNullWhen(true)] out EntityUid? uid,
+        EntityUid? mapUid,
+        ComponentRegistry? overrides = null)
+    {
+        return EntityManager.PredictedTrySpawnInContainer(protoName, container, out uid, mapUid, overrides);
+    }
+
     /// <inheritdoc cref="IEntityManager.TrySpawnNextTo" />
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     [ProxyFor(typeof(EntityManager))]
@@ -1132,6 +1179,18 @@ protected EntityUid PredictedSpawnInContainerOrDrop(
         return EntityManager.PredictedSpawnInContainerOrDrop(protoName, containerUid, containerId, xform, container, overrides);
     }
 
+    /// <inheritdoc cref="IEntityManager.SpawnInContainerOrDrop" />
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    protected EntityUid PredictedSpawnInContainerOrDrop(
+        string? protoName,
+        BaseContainer baseContainer,
+        TransformComponent? xform = null,
+        ContainerManagerComponent? container = null,
+        ComponentRegistry? overrides = null)
+    {
+        return EntityManager.PredictedSpawnInContainerOrDrop(protoName, baseContainer, xform, container, overrides);
+    }
+
     #endregion
 
     #region Utils
diff --git a/Robust.Shared/GameObjects/IEntityManager.Spawn.cs b/Robust.Shared/GameObjects/IEntityManager.Spawn.cs
index 9a973cb4f94..2b537523386 100644
--- a/Robust.Shared/GameObjects/IEntityManager.Spawn.cs
+++ b/Robust.Shared/GameObjects/IEntityManager.Spawn.cs
@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
-using Robust.Shared.Collections;
 using Robust.Shared.Containers;
 using Robust.Shared.Map;
 using Robust.Shared.Maths;
@@ -60,6 +59,21 @@ bool TrySpawnInContainer(
         ContainerManagerComponent? containerComp = null,
         ComponentRegistry? overrides = null);
 
+    /// <inheritdoc cref="TrySpawnInContainer(string?,EntityUid,string,out EntityUid?,ContainerManagerComponent?,ComponentRegistry?)"/>
+    bool TrySpawnInContainer(
+        string? protoName,
+        BaseContainer container,
+        [NotNullWhen(true)] out EntityUid? uid,
+        ComponentRegistry? overrides = null);
+
+    /// <inheritdoc cref="TrySpawnInContainer(string?,EntityUid,string,out EntityUid?,ContainerManagerComponent?,ComponentRegistry?)"/>
+    bool TrySpawnInContainer(
+        string? protoName,
+        BaseContainer container,
+        [NotNullWhen(true)] out EntityUid? uid,
+        EntityUid? mapUid,
+        ComponentRegistry? overrides = null);
+
     /// <summary>
     /// Attempts to spawn an entity inside of a container. If it fails to insert into the container, it will
     /// instead drop the entity next to the target (see <see cref="SpawnNextToOrDrop"/>).
@@ -82,6 +96,23 @@ EntityUid SpawnInContainerOrDrop(
         ContainerManagerComponent? containerComp = null,
         ComponentRegistry? overrides = null);
 
+    /// <inheritdoc cref="SpawnInContainerOrDrop(string?,Robust.Shared.GameObjects.EntityUid,string,Robust.Shared.GameObjects.TransformComponent?,Robust.Shared.Containers.ContainerManagerComponent?,Robust.Shared.Prototypes.ComponentRegistry?)"/>
+    EntityUid SpawnInContainerOrDrop(
+        string? protoName,
+        BaseContainer container,
+        TransformComponent? xform = null,
+        ContainerManagerComponent? containerComp = null,
+        ComponentRegistry? overrides = null);
+
+    /// <inheritdoc cref="SpawnInContainerOrDrop(string?,Robust.Shared.GameObjects.EntityUid,string,Robust.Shared.GameObjects.TransformComponent?,Robust.Shared.Containers.ContainerManagerComponent?,Robust.Shared.Prototypes.ComponentRegistry?)"/>
+    EntityUid SpawnInContainerOrDrop(
+        string? protoName,
+        BaseContainer container,
+        out bool inserted,
+        TransformComponent? xform = null,
+        ContainerManagerComponent? containerComp = null,
+        ComponentRegistry? overrides = null);
+
     /// <summary>
     /// Attempts to spawn an entity adjacent to some other target entity. If the target entity is in
     /// a container, this will attempt to insert the spawned entity into the same container. If the insertion fails,
diff --git a/Robust.Shared/GameObjects/MapInitEvent.cs b/Robust.Shared/GameObjects/MapInitEvent.cs
index dcb3ac249b6..a823872dd14 100644
--- a/Robust.Shared/GameObjects/MapInitEvent.cs
+++ b/Robust.Shared/GameObjects/MapInitEvent.cs
@@ -1,7 +1,7 @@
 namespace Robust.Shared.GameObjects;
 
 /// <summary>
-///     Raised directed on an entity when the map is initialized.
+///     Raised directed on an entity when the map has been initialized and the entity has been successfully reparented.
 /// </summary>
 [ComponentEvent(Exclusive = false)]
 public sealed class MapInitEvent : EntityEventArgs