frother

This term refers specifically to a kitchen appliance designed for aeration. It is most commonly used in the context of specialty coffee preparation, such as making cappuccinos or lattes, where the goal is to introduce air into milk to create a microfoam texture.

In a commercial setting, a frother may be integrated into an espresso machine as a steam wand, whereas in a domestic setting, it often refers to a standalone handheld battery-operated whisk or a jug-style electric frother.