You usually make coffee by mixing coffee powder with hot water, then stirring it with a spoon. How troublesome is it, don't you think? Now, imagine all you need is to mix the powder and hot water in the Self Stirring Mug, then just sit back and relax. All you need to do is gently push the button, and you will have your well-mixed coffee for the day. Sturdy & Eco-Friendly This Self Stirring Mug works quietly, and it can go up to 3,000 revolutions per minute - nothing can't be mixed at this speed. The mug itself is made mainly with PVC, an environmentally-friendly material that reduces any sort of health risk. It has a recyclable PP lid with a silicone ring, sealed and watertight. If you're planning to buy a gift, this is your best choice ever. Details Capacity: 14oz / 400ml Height: 6.3 inches Width (including handle): 4.5 inches Power: 2 x AAA batteries (not included!) Material: Plastic Package includes: 1 x Self Stirring Mug