Celebrity Tumbler is a classic American soda styled tumbler that is made from virtually unbreakable polycarbonate. Individually wrapped. Dishwasher safe and reusable they are very rigid and will withstand up to up to 300 uses without showing signs of wear and tear. Polycarbonate product can be sterilised & will withstand temperatures up to 145°C. Polycarb is resistant to oil, dilute acids, alcohol and it is flame retardant.