With acrylic drinkware like this, you can serve outdoors (or indoors) without fear of dropped and shattered glass. Crafted from acrylic and designed to mimic the look and feel of glass. All items are scratch resistant, shatterproof, durable, dishwasher safe, and reusable for both indoor and outdoor entertaining. BPA-free, Prop 65 compliant and dishwasher safe (upper rack recommended). Set of six 18.4 oz. glasses.