Glass Bottle

The Glass Bottle is an item used to pick up water to make Water Bottles, which is the starting point of the Brewing process.

Usage
Glass bottles can be filled to make Water Bottles, which can then be used to brew items with a Brewing Stand. Glass bottles are also used to hold the resulting potion.

A bottle may be filled by holding it in your hand and right clicking on a water source block or a filled Cauldron. If filled via a water source, the water will be unaffected. If filled via a cauldron, 1/3 of the water in the cauldron will be removed. Therefore, using a Cauldron to fill bottles is inefficient, except in the Nether where it is normally the only way to fill bottles. Also, as of The Pretty Scary Update, Witches may also drop Glass Bottles.

If a glass bottle is filled with water and in the player's hand holding down the right click button will activate a drinking animation and allow the player to drink water, at the time of this writing this serves no purpose but removes the water from the bottle.