Bowl of Commanding

Wondrous item, rare. Bowl of Comanding Water Elementals
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.