Fern Home Coffee Mug - Silicone Drinking Unbreakable Cups 12 Oz. Re - Usable Cups with Snap-on Lid - Heat Resistant - Microwave Safe - Travel Mug - Ideal for Storing Beverage on Go - Eco-friendly SILICONE CONSTRUCTION; coffee cup constructed from 100% FDA approved food safe silicon and high quality 18/8 stainless steel rim. It wont compromise the taste of your drink. ECO FRIENDLY; no more wasted paper cups and plastic lids, re-use the Cup time and time again. Anti-dust, anti-slip, anti-aging, anti-stain, non-stick material. LARGE CAPACITY; Silicone coffee cup with 12 oz capacity, perfect for large servings of you favorite beverages. HEAT RESISTANT; Silicone coffee cup is microwave safe and can withstand high temperature from -40 to 250 centigrade. SNAP ON LID; tight, leak resistant, spill resistant snap on lid Silicone coffee cup with 18/8 stainless steel rim for easy drinking on the go. Lifetime guarantee.