A great product. The forms must be kept stable enough to the dough in the form, it is not necessary additional sheet. The muffins can be super easy to solve from the mold. The material is odorless, super flexible and easy to clean. In addition, the colors are quite appealing and the cabinet is neatly saved space. Here are some data: - Be heated to 230 ° C - Cold-resistant to -60 ° C - Dishwasher - Microwave safe - Food-safe - 15-year guarantee - Above 7 cm wide, 3 cm high and down about 4.5 cm wide A short muffin recipe was also there. Conclusion: I am thrilled to be a must for muffin lovers.