Silicone Material: The muffin cup is made of high quality silicone material, which is reusable, BPA free, durable, heat resistant, non-stick, etc. It is a good helper for making muffins and cupcakes. For high and low temperature: The muffin box can be used in the oven at temperatures up to 240 degrees Celsius or frozen in the refrigerator. High-quality silicone material is soft, dimensionally stable, and not easily deformed or broken. They can also be used in any traditional muffin pan, so you can always enjoy baking time with family and friends. Easy demouldingThe inner layer of muffin silicone is smooth and non-sticky, and the cake is easily deformed and demolded. The reusable silicone material is very easy to clean and is not easily contaminated by oil. Tip: It is best to let the cake cool before using. Perfect Size: The top diameter of the muffin cup is approx. 6.5 cm, bottom diameter 4 cm, height 3.5 cm. It's the ideal size for muffins or cupcakes and fits in any traditional muffin pan. Versatile Uses: The muffin box is great for making muffins, cupcakes and muffins, but also for chocolate desserts, chicken pies, mini quiches and jellies. Perfect for kids parties, family dinners, school parties and more.