20 oz. straight tumbler. Vacuum insulation design keeps the temperature of the beverage in good condition up to 12 hours. 100% leak-proof & handle lid makes it is easy to carry it in backpack. Diameter is 2.8” and weight of 12oz per tumbler so that kids can hold it comfortably and easily. Wide mouth design makes it is very convenient to add ice cubes or to clean the skinny tumbler. Suitable for most car cups holders.