product 1.Food-Grade MaterialsMade of food-grade material, safe. The sturdy mixing cup and sealing ring prevent liquid leakage, and the neat design is easy to hold and drink.2.Easy to UseJust press the button on the handle and your self-cooking coffee cup will begin mixing ground coffee and hot water into a cup of espresso.3.PowerfulThe upgraded electric shaker is equipped with a high-speed motor, just like a strong vortex in a tornado. Your protein powder can be easily mixed evenly without residue or lumps.4.large-Capacity, Easy to CarryThis large-capacity auto stirring mug is a great to-go water drinking bottle.5.SafetyThe rugged double-walled ensures maximum durability, improved insulation and thermal insulation. The self-cooking cup with non-slip PVC base is reliable and safe when holding hot drinks.