Plastic Martini Glass - Classic 8 Oz. Unbreakable Polycarbonate Martini Glasses are a shatterproof interpretation of the timeless Martini Glass. These high-quality plastic martini glasses are sold by the individual piece (each), and are designed to replace fragile glass stems - no minimums required! 6 5/8 inches tall x 4 3/8 inches diameter. These clear unbreakable plastic Martini Cocktail Glasses are freezer & dishwasher safe (top rack, regular or normal cycles only, no heat dry cycle).