Grand 22 oz. Unbreakable Polycarbonate Plastic Tumblers or Highball Glasses. The polycarbonate used to manufacture these sturdy, clear plastic tumbler glasses is the same material used in bullet-proof glass and aircraft canopies. These high-quality unbreakable plastic tumblers are designed as an alternative to fragile glass, and are sold by the individual piece (each) - no minimums required! 6 1/2 inches tall x 3 5/8 inches diameter. Grand 22 oz. Unbreakable Polycarbonate Plastic Tumblers are microwave and dishwasher safe (top rack, regular or normal cycles only, no heat dry cycle).