Bukkit

Version 0.3:

• Tested on 1.12.2. (may still work for older versions or 1.13, but try at your own risk).
• Improved the way the plugin prevents storing Undroppable items into Chests etc..
• You can now allow or deny storage of an Undroppable item per inventory type (Chest, Ender Chest, Furnace, Workbench, Dispenser, Dropper etc.)
• Undroppable items are now unable to be placed into Item Frames (also bypassable)