Bowl

Bowls are containers that are used to hold certain foods.

Fishing
Bowls can be obtained as a "junk" item while fishing.

Eating
Foods contained within these bowls will turn into an empty bowl when eaten.

Fuel
Bowls can be used as a fuel in furnaces, smelting 0.5 items per bowl in the Java Edition, and 1 item per bowl in Pocket Edition.

Food Source
a bowl on a Mooshroom turns the bowl into Mushroom Stew. The stew can then be consumed immediately and the process repeated, making this an excellent way to quickly restore depleted hunger and saturation with almost no cost or effort. Inventory space is saved because you don't need to have red and brown mushrooms, and the Mooshroom isn't turned into a Cow as it would be if you sheared it for the mushrooms.