These Reusable Silicone Muffin Cup Are Made of Food-grade Silicone (heat Resistance Up to 445 F), Eco-friendly, Easy-release, Bpa, Pvc, & Phthalate-free. Ideal for Baking, Lunch, Snack Cup, & More. with the Delicate Appearance & Bright Colors, the Silicone Muffin Liners Are a Quick & Festive Way to Dress Up Your Cupcakes & Muffins, Making Your Muffins, Cakes, Biscuit & Pastries More Attractive & Impressive.