Chest

Chests are blocks that can store items. A single chest block can store up to 27 stacks of item or blocks. It is able to hold from 0 to 1728 blocks/items (All stacked to 64). A large chest, which is created by placing to single chests next to each other. A large chest has 54 storage slots, and is able to hold form 0 to 3456 block/items (All stacked to 64). The top three rows in the interface correspond to the eastern or northern chest block and the bottom three to the southern or western chest block.

Colored chests are made from the type of planks, and there's even a dark matter chest, which would hold more items. But that chest in not fully implemented yet, there's not even a crafting for it.

Naturally generated
Normal chests can be generated in dungeons (where they are guarded by a monster spawner), in strongholds, jungle temples, nehter fortesses, and NPC Villages. Chests also spawn if the bonus chest option is enabled in the world options menu.

The chests from this mod do not spawn naturally.

From minecarts with chests
Breaking a minecart with chest drops a chest, as well as the cart and anything in the chest.

Yet, once again, the chests in this mod can not even be crafted into a custom colored chest minecart.

Usage
Used to store items and blocks. Duh.

Special Occasion Chests
Like normal chests, the mod's also change on Christmas. Dark matter chest doesn't do any changing.

But, they also change on MCE's birthday. (June 16th) The textures look similar, this will probably change.

Bonus Chest
To see the normal bonus chest, visit the Minecraft Wiki.

The chests in the mod do not spawn if the option in the world menu for the bonus chest is enabled.

Trivia

 * Just like the normal chests, on Christmas eve and day, all of them (Except dark matter) change to the Christmas chest texture.
 * On MCE's birthday, the chests from the mod change texture too (Again, except dark matter). The texture is similar to the Christmas one, but the decor of the Christmas trees are taken off, and a different patter lays there.