This stacking mixing glass from Libbey® has a capacity of 22 ounces and is part of the Infinium™ premium plastic drinkware collection. It is made of 100% BPA-free Tritan™ copolyester and mimics the clarity of glass. It is virtually unbreakable and is perfect for outdoor or poolside service. This glass is resistant to impacts, cracking, crazing and shattering. It is dishwasher safe and maintains a "like new" appearance after hundreds of cycles.