12 oz. Self-Stirring Coffee Mug In Red Steel with Splash Proof Cover. Stir and mix your beverage with the press of a button. The Self-Stirring Mug- this self-stirring mug is battery operated. It has a little motor at the bottom of the cup that stirs your coffee/ tea/ coco with a touch of the button. It is great for travel and using at home. Red, 12 ounce double walled steel mug with splash proof cover. Hand wash. Requires 2 AAA batteries, not included.