Nutts Hold the mixer upside down. gently Slide open the top section. Insert the Batteries according to the diagram made on the side Slide the top back to its original position and enjoy its use. Where ever you need frothed milk or cream, milk frother will do the job for you quickly and easily.You can mix hot chocolate, matcha tea, bulletproof coffee, protein powders, chai tea, whipping egg whites, mixing green powders.