diff --git a/src/AcDream.Core.Net/WorldSession.cs b/src/AcDream.Core.Net/WorldSession.cs
index 47785496..60e4aa6f 100644
--- a/src/AcDream.Core.Net/WorldSession.cs
+++ b/src/AcDream.Core.Net/WorldSession.cs
@@ -1224,6 +1224,15 @@ public sealed class WorldSession : IDisposable
         SendGameAction(InteractRequests.BuildUse(seq, targetGuid));
     }
 
+    /// <summary>Send PutItemInContainer (0x0019) — move an item into a container at a slot. placement
+    /// = the target slot (server packs/shifts); the drag-drop drop handler computes it. Retail:
+    /// CM_Inventory::Event_PutItemInContainer → ACE Player.HandleActionPutItemInContainer.</summary>
+    public void SendPutItemInContainer(uint itemGuid, uint containerGuid, int placement)
+    {
+        uint seq = NextGameActionSequence();
+        SendGameAction(InteractRequests.BuildPickUp(seq, itemGuid, containerGuid, placement));
+    }
+
     /// <summary>Send retail QueryHealth (0x01BF). Server replies UpdateHealth (0x01C0).</summary>
     /// <remarks>
     /// Retail anchor: <c>CM_Combat::Event_QueryHealth</c> / <c>gmToolbarUI::HandleSelectionChanged:198635</c>