Switch buttonWe put the switch button precisely on the top of the handle, so it is easy to open. Just press the self-stirring button on the cup, and the propeller at the bottom will rotate into motion, mixing the solid and solvent particles into a lovely foam. Easy to cleanIf you don't need the stirring function, our stainless steel coffee cup can be used as a normal drinking cup. The cleaning is simple, but do not wash it in a dishwasher or completely soak it. Humanized designThe silicone seal will firmly fix your cup to keep the temperature and coldness of your drink for about 3 hours. The lid has a hole for you to drink coffee with a straw. The perfect giftOur stainless steel coffee cups are very suitable as gifts for family, girlfriends and friends. Please believe it will bring convenience to your family's life. Power supply: 2 AA batteries No battery provided Delivery Quantity: 2pcs, Package Contents: Only the above package contents, excluding other products. Size: 11.8x8.8x8.8cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Color: black+red (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)