Plastic Martini Glass - Grand 10 Oz. Unbreakable Polycarbonate Martini Glasses are just the right thing for use around the pool, on the patio, or on the yacht! These clear, high-quality unbreakable plastic martini glasses are designed as an alternative to fragile glass stems, and are sold by the individual piece (each) - no minimums required! 7 3/8 inches tall x 5 inches diameter. Grand Unbreakable Polycarbonate Plastic Martini Glasses are both freezer & dishwasher safe (top rack, regular or normal cycles only, no heat dry cycle).