No need to recharge the automatic mixing cup: automatic mixing, no charge, no battery.The whole machine is waterproof, safe and washable: deep waterproof, and can rinse the cup normally under the tap.Physical cooling and safety:85 Celsius hot water rapidly cooling to about 55 Celsius, physical insulation energy absorption and heat storage, low temperature environment reverse compensation temperatureBest gift concept: lovely gift. Suitable for families, friends and colleagues who like coffee, hot chocolate, protein powder or other drinks that need to be stirred. Suitable for family, office, tourismDurable quality: The automatic mixing cup is designed to provide you with safe and durable products using advanced technology and food-grade materials.Type: Automatic Self-stirring CupCapacity: 350mlTemperature Range: 0~100 Celsiuscolour:Black+GrayMaterial:Pp+siliconesize:12*85cmPackage Contents:1* Automatic Self-stirring CupOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.