Ender Chests are entity Blocks that were added in Update 1.0, and can be found in End Cities.
The Ender Chest, an alternate version of the Chest, is crafted with 8 Obsidian surrounding an Eye of Ender.
The Ender Chest is a block which allows a player to store 27 items, much like a wooden chest. However, if two Ender Chests are placed in different places, the items inside chest A will also be accessible in chest B. The two chests share a storage area, so if an item is taken from one chest, it will disappear from the other chest as well.