Viking Nature Premium Silicone Glasses Set of 2 - Unbreakable / Stemless / Flexible / Dishwasher Safe Cups for Wine, Beer, Soda or Your Favorite Beverages Viking Natures Premium Silicone Wine Glasses are made of 100% BPA free food grade silicone, non toxic. Our Wine Glasses are Unbreakable,stemless,eco-friendly,Shatterproof and reusable -Perfect for outdoor activities, such as: Boating, Camping, Beach, Picnics, traveling, barbecues and a lot more Safe for dishwasher, microwave oven,freezer and refrigerator Impress your family and friends with this innovative set of Viking Natures silicone wine glasses, they really look and feel great, which also makes them a perfect gift. Each cup measures 3.4in x 4.2in (8.5cm x 10.5cm) but will squash flat for easy storage.