AUTO STIRRING STAINLESS STEEL CUP-GOOD QUALITY-HAVE TWO FUNCTION CUP AND CAN USE FOR MIXING WATER-MATERIAL HIGH QUALITY STAINLESS STEEL AND FOOD GRADE PLASTIC WILL NOT CAUSE CHEMICAL HAZARDS FOR HUMAN BODY-SAFE TO USE-MAX WATER CAN PUT 400ML-USING AAA BATTERY-PORTABLE CAN USE AT HOME AND TRAVELIF WANT MORE FAST STIRRING OR MORE POWERFULL STIRRING CAN USE ALKALINE BATTERU.MORE GOOD BATTERY QUALITY MORE POWERFULL THE MUG STIRRINGPACKAGE INCLUDEDELECTRIC COFFEE CUP X1FREE GIFT CHEAP BATTERY X1