Tupperware cup can hold 100 degree hot water. Tupperware water cup is made of specially treated plastic, which can withstand the highest temperature of 100℃ without releasing harmful substances. It has been strictly inspected by the US Food and Drug Administration (FDA), Japanese Health Association (JPHA) and China Health and Quarantine Department to ensure safety and hygiene. This material also has the characteristics of acid resistance, alkali resistance, salt resistance and anti-aging, so the normal service life of Tupperware cups can reach several decades. However, it should be noted that although Tupperware cup can withstand high temperature, it should be used in a correct way to avoid cracking or deformation of the cup.