Come and see our amazing products. This 13.4 OZ mug made of stainless steel and food grade PP material can mix coffee or tea automatically espically for lazy people. The mug has the fuction of temperatute preservation. It is designed with a hidden button, just press the button on the handle to do self mixing. It is great for office, car, travel, home and more. Battery operated, required 2 AAA batteries, not included. It can be used for advertising and as a promotional gift. Your print logo is welcomed. Pls confirm with us about the packing info, stock color and exact production time before placing your order.