Potion

Potions are a future craftable food items that confer specific effects in Minecraft. Potion recipes have not yet been defined as of the Beta 1.9 Pre-release. But Potion effects were introduced in Beta 1.8.

History
Potion effects were introduced in Beta 1.8. Jeb later tweeted a potion effects screenshot taken from within from Beta 1.9 Pre-release 2. The image shows potion effects, potion levels, and potion duration, as well as what appear to be potion bottles or vials.