Food-Grade PVC Material-- The coasters are from food-grade polyethylene so it has strong flexibility. Premium PVC material offers that they won't absorb odor, stain, rust, crack, or chip. They can be bent, twisted, pinched, and they can be touched food directly, which is beneficial for your health and safety. Keep Spills and Stains From Your Table -- With sunflower coasters you will be able to relax and enjoy all the funny moments with your friends and family knowing all your countertops and furniture both indoor and outdoor will be safe and clean. The practical and durable coasters are the perfect match for any daily life, you can use them on your dining table, coffee table, or even for your favorite cup at the office. Size and Heat Insulation-- Size: 3.93in*0.1in / 10cm*0.26cm. Extreme temperatures range from -40F to 392F. No smell, non-toxic, protect your countertop or table from hot pot and hot dishes. Please note that the microwave and oven environment is NOT applicable. Multi-Purpose and Easy to Wash-- The soft and flexible coaster can be used as a trivet for hot pans replacing the traditional wooden trivets or even as a jar opener. Then after you have used them, all you have to do is to throw them in the dishwasher and let it do its thing or rinse them with water simply. Decorate Your Home-- The flower-shaped design resembling a sunflower can decorate your kitchen, living room, or dining room. Help you keep a good mood every day.