For years, we've searched for the perfect wine glass for outdoor entertaining, picnics on the beach and pool parties. Finally, this wonderful Govino shatterproof glass came along! The stemless, unbreakable "glass" is not made of glass at all, but from a flexible, BPA-free, odorless polymer, which reflects a wine's color and projects its aromatics much like crystal. Designed into the glass is an ergonomic thumb notch on the side, giving the user a secure and comfortable grip for swirling and drinking wine. The notch also acts as a stem without a stem, preventing heat transfer. The glass is shatterproof, reusable and 100% recyclable, and also works for other cold beverages as well. Hand wash only! Govino was designed for commercial use and can withstand most industrial glass sanitation systems (1-2 minutes at 160°F). Since domestic dishwashers are so widely varied, we cannot claim our product is 100% dishwasher safe. Glass Specifications Width: 3.3 inches Height: 4.4 inches Mouth: 2.5 inches Volume: 6 ounces up to the mid point of the thumb notch - 16 ounces up to the brim.