Bowl of Commanding Water Elementals

Wondrous item, major, rare

• Weight: 24.0 lbs.

While this bowl is filled with water, you can use an action to speak the bowl’s command word and summon a water elemental, as if you had cast the conjure elemental spell. The bowl can’t be used this way again until the next dawn.

The bowl is about 1 foot in diameter and half as deep. It weighs 3 pounds and holds about 3 gallons.

Source: Dungeon Master’s Guide p. 156. Available in the SRD