Dimart Battery-operated Protable Digital Coffee Milk Auto Self-Stirring Mug Mixer Shaker Cup Pink The world's most powerful handheld vortex drinks mixer. Drink your coffee and chocolate milk in style with the new unique self-stirring mug, convenient and save time. Totally cool mixing action makes a whirling vortex of power to thoroughly dissolve chocolate powder mixes or syrups. No more messy spoons or spills. Full sealed and water-tight, by adjusting rotative lid bubbler to drink directly or insert one straw to drink. Environmental protection material, durable transparent PC body, heat-resistant, non-toxic and odorless. Power supply: 2 x AAA Batteries (Not included). Internal self-cleaning. Simply add water, a drop of detergent & switch on to clean your cup.External cleaning, just put it into water to wash it but don't use dishwasher or microwave oven to clean it.