Waterskin of the Infinite (3.5e Equipment)
From D&D Wiki
|Price:||Price 1,000 gp|
|Aura:||Faint Transmutation; DC 15|
This appears to be an ordinary waterskin, but it is always full of clean drinking water. Intended to be an inexpensive alternative to the Decanter of Endless Water, though lacking the power to do much more than guarantee the owner need not worry about getting clean drinking water.