Grandma Reusable Baking Cups - Non Stickable - Made From 100 % Silicone - 24 Cups - Good for Baking Cupcakes & Muffins 100% Pure Silicone Oven, Freezer, Microwave and Dishwasher Safe Cooking Spray is not require Our baking cups can withstand temperatures from anywhere around -22 to 446 degrees fahrenheit. Made out of materials 1mm thick with a top diameter of 7cm. The size of the cups is 7*7*3cm.