Cauldron

The Cauldron is a future craftable essential block in Minecraft. It will be used to brew Potions.

History
Alchemy was first hinted at in July 2010, when Notch hinted that redstone dust would later be used in potions. Potion effects were introduced in Beta 1.8, and expanded on in the Beta 1.9 Pre-release.

On September 27th 2011 Jeb tweeted that there wasn't enough time to add the brewing system to Beta 1.9.

On September 29th 2011 Jeb tweeted about issues with the current implementation of cauldrons.