The Ninja Coffee Bar Milk Frother Press is specially designed to transform milk into rich, creamy foam for your favorite indulgent, specialty Ninja Coffee bar coffee! Frothing Milk for Specialty Drinks - Create coffee bar, specialty drinks in your home! Microwave and Froth in Glass - Added convenience. Quick and Easy Frothing - Froths milk in 12-20 pumps. Dishwasher Safe, Microwave Safe.