Aerolatte’s Steam-Free Milk Frother To Go with Storage Case allows you to make and enjoy rich, frothy beverages anywhere without electricity. Made of 18/8 stainless steel and plastic, included are the frother, storage case, and batteries. Simply measure warm or chilled milk into a mug or glass, submerge the frother’s whisk end and hold the power button to froth in about 30-60 seconds, until the foam has reached your desired consistency. Great for whole, skim, and goat milk, hemp, almond, soy, cashew, and other non dairy milks. Hand wash the whisk’s end in warm, soapy water.