Minecraft wiki entry for Transportation_methods, associated text: End game items that can be crafted from 2 shulker shells and a chest, these boxes allow for the most efficient storage in the game. The size of a single chest, each box retains its contents when broken, allowing for a backpack of sorts. While shulker boxes cannot be placed inside other shulker boxes, just a few shulker boxes in a player's inventory can allow for a small storage room's worth of items to be in the player's hands at any given moment. They can additionally be dyed and named to create catalogs of what items they contain.