Zhide Set of 4 Silicone Wine Glasses Stemless-12 Ounce 4 Bright Colors Available (Blue) Material:Made of Shatterproof food grade silicone Capacity:Each glass holds 12 oz The flexible rubber glass has a temperature range of -46F to 460F(-40C to 230C)so they won't melt or crack like other plastic cups Perfect for camping,beach,tailgating,boating,pool parties,and barbecues Easy to clean and maintain