Conjured Purified Water

Conjured Purified Water is created by mages and helps restore mana to a drained spellcaster.

Source
This item is conjured by mages using the rank 3 spell Conjure Water. A level 20 mage will create 2 charges per cast, and the number of charges increases by 2 per level up to a maximum of 20 (at level 29).