Kuke Unbreakable Silicone Wine Glasses Stemless 9 & 12 Oz for Camping Hiking Daily Use Material:Made of Shatterproof food grade silicone Size L holds 12 oz and Size M holds 9 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 Easy to clean and maintain,perfect for camping,beach,tailgating,boating,pool parties,and barbecues Easy to clean and maintain Different bright colors are available,you can choose the color and size freely according to what you like