1.100% food grade silicone 2.During -40C to 240C 3.Easy to use,reusable colorized nut muffin baking cups wholesale1.)Material;greaseproof paper,2) Sizes: several sizes available as per customers' requirements3) Shapes: round,4) Colors: white, red, yellow, brown, green with printed designs5) Packing: as per customers' requirements muffin baking paper cup / food grade paper cups