All of the Dungeon Decor blocks upon initial release.
An image of the special small backpack item.
Each of the storage blocks has it's own GUI centered around it, such as the coffer. The coffer is like a chest, but is blast resistant.
This image is from an upcoming mod release of the Net.Arsonists Modding Team. It shows part of a dungeon that makes use of the blocks found in the Dungeon Decor mod.