Glass breaks and one can expect to replace glasses like this on a regular basis. This is made from polycarbonate instead of real glass, making it virtually unbreakable as well as dishwasher safe Use inside or out being made of unbreakable plastic. White and dishwasher safe. Ideal for events, parties, barbecues, glamping, camping, festivals, pool sides as a safer alternative to glass without any compromise in quality and feel.