From the manufacture

• Aerolatte’s Original Steam-Free Milk Frother To Go with Storage Case for making and enjoying rich, frothy beverages anywhere without electricity
• Made of 18/8 stainless steel and plastic; lead, cadmium, phthalates, and BPA free; Prop 65 compliant; includes frother, storage case, and batteries
• Measure milk into a mug or glass, submerge frother’s whisk end and hold power button to froth, about 30-60 seconds, until foam has desired consistency
• Convenient travel case stores frother for safe transport; great for whole, skim, and goat milk, hemp, almond, soy, cashew, and other non dairy milk
• Easy to use; more compact and economical than espresso machines; hand wash frother's whisk end in warm, soapy water