YouLiYou&reg; Coffee Self Stirring Novelty Mug Tea Cup Auto Mixing Stainless Plain Lazy 100% authentic,2-6 business days delivery in USA. This hot stainless plain lazy self stirring mug is specially designed to auto mixing tea, coffee, etc. Just press the button on the handle, it will do self mixing immediately. No spoon any more, quickly stirring cup for both home and office use. Just press the button on the handle to do self mixing, easy and convenient. Mute mixing impeller and sealed mug cover, no need to worry about liquid splashing. Battery requires: 2 x AAA battery (NOT included).