Jypc 4 Color Collapsible Coffee Silicone Filter for Camping,Hiking,Backpacking and Outdoor Use Raw material environmental friendly: This product uses environmentally-friendly silica gel as raw material, safe and non-toxic, Passed FDA and LFGB certification. You can have intimate contact with your beverage. Does not produce any toxic substances High temperature and low temperature resistance: The temperature range is -40C to 230C. It will not produce any toxic substances due to the temperature limit, nor will it damage the coffee funnel. It can be used in all types of ovens, microwaves, dishwashers and refrigerators. Excellent toughness and elasticity: The product can be bent, stretched, folded and quickly restored to its original shape. The product is soft and smooth, has a good touch.It is easy to clean, not easy to age and fade, The coffee filter has a long service life. Practical and portable: The product is lightweight and easy to carry. Use it at home, outdoors, traveling, office, backpacking and RV to drink fresh coffee or tea.Collapsible design make a storage a breeze