MatchaDNA Milk Frother - Handheld Battery Operated Electric Foam Maker For Bulletproof Coffee, Lattes, Cappuccino, Hot Chocolate, Sleek Drink Mixer (Round Tip 1 Pack) Handheld, Battery Operated Milk Frother Stainless steel shaft and whip. ABS Plastic Body Stainless steel shaft and whip. Slide open top of frother to easily insert batteries