The Diamond Chest has slots. It does not link with other chests to make a double chest. Place the most useful items in the slots you can quickly access. 6. Putting 2 chests next to each other makes a double chest, holding twice as many slots, or 54. A double chest can hold up to 54 stacks of items or blocks meaning a double chest this will move all items in the slot to a free slot in the inventory or vise versa.