Zelazny's Arcane Create Water

You create up to 4 gallons of clean, drinkable water, which appears within range in an open container or on the ground. The water can't be created inside a living creature, and it lasts until it's consumed, evaporates, spills, or is otherwise lost.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you create 4 additional gallons of water for each slot level above 1st.