Material: The cooling cup uses colorful plastic as outside to make the whole machine look good, and uses food-grade aluminum as the inside of the cup to maintain food safety. Aluminum has great thermal conductivity thus it can make cooling process fast and easy. Dimension: The cup has diameter of 3.6"(9cm) and height of 4"(10cm). It allows you to fill 420ml of drinks, which is totally enough for one full can. Features:The cooling cup uses semiconductor TEC cooling chip to quickly chill your drinks. It's lightweight and easy to carry. You can take it to any place where you can't find a fridge. It's one button On/Off design make it super easy to use. To cool room tempereature water down to 46-60 Fahrenheit, it take only 16 mins. If you condinue to cool for longer time, temperature can drop to 35-42 Fahrenheit. The cooler machine has fan to release heat so it allows long time usage. Usage: There are 2 ways to use this cooling cup. One way is to pour drinks directly into the cup to cool. Other way is to put whole bottle/can into the cooler cup, fill the gap between the bottle and cooler cup with water. This way is more suitable for sharing. You can also put cold drinks inside the cup to remain cool for a long time, if you dont want to consume it now. Satifaction Guarantee: Comes with 100% no-hassle satisfaction guarantee. We are confidence with the quality of our products. Please feel free to contact us, we are glad to hear from you. Fashinable and easy to use cooler cup that allows you to refridgerate any beverage with just one click. Specification: Color: Pink, Mint Green, Greenish Blue, White Material: Aluminum and plastic. Size: Diameter of 3.6" and height of 4" for cup Package Include: 1 x cup, 1 x cooling machine, 1 charger Warm Tips: As the size is measured by hand, there will be a little error, please understand. Because of the difference between the light and the display, the color of the product is based on the actual situation.