GD Basic Series: 12oz Double Wall Glass Tumbler/Mug with Removable Stainless Strainer and Spill-proof Silver Color Mirror Cap BPA free Perfect for Iced Tea, Icy Cold Drink or Hot Tea and Coffee Actual drinking capacity: 11oz with Stainless Steel Infuser. Double wall drinking glass protects hands from heat while keeping the temperature. Double wall drinkware leaves no water rings and stain on the table. Glass is better than plastic. BPA free and Made with high quality borosilicate glass.