Silicone cup lids: Standard: enviromental, food-grade, eco-friendly 1) Made of 100% food grade silicone, non-stick, flexible and easy to clean 2) Temperature range: -40 230°C 3) Dishwasher safe, easy to store 4) Various design and different color selection 5) Customers' designs are highly welcome 6) silicone cup used for keep coffee fresh