Milk Bucket

Milk is an item obtained from Cows and Mooshrooms by right-clicking on them with an empty bucket. It can be used as an ingredient in cake, or can be used as food on its own. The player cannot place milk down like water or lava.

Usage
You can milk a cow infinitely as long as you have enough buckets. Right clicking with a full bucket of milk will start the drinking animation. It doesn't fill up the hunger bar, but will immediately cure the Player of any status changes or cancel the effect of poison and other potion effects.

Since it cures poison, an ideal source of food would be rotten flesh followed by a bucket of milk, which will restore hunger and then cancel out the poison, respectively. This would only require a cow and an open space for zombies to spawn on at night.

Because of its ability to cure status effects, it is a good idea to take it into an Abandoned Mine Shaft for curing the poison from Cave Spiders.

Another usage of milk is when an animal which is able to maure (Like Pigs, Cows, Chickens, etc) is left-clicked with the milk in hand, the animal will revert back to baby-non/mature state.

Trivia

 * The milk bucket along with all the tools (pickaxe, shovel etc.) are the only crafting ingredients that do not stack.
 * Unlike most foods, the player may consume milk in Creative mode.