Is Silicone Safe for Non-Toxic Cooking?
The short answer is yes, silicone is safe. According to the FDA, food-grade silicone cookware and utensils do not cause harmful chemical contamination of foods.
Plastics ruled the market for years before studies revealed that they are toxic. This created space for a safe alternatives and silicone filled it quite nicely. You can find this material in baby pacifiers, toys, food containers, baking sheets and so on.
Muffin cups can also vary in size too. No greasing, no fuss and so much better than using paper liners which may or may not easily remove at serving time.
Silicone bakeware purchased from well-known kitchenware brands is usually made of FDA-approved food-grade silicone and this should be clear on the packaging description. Each piece of silicone has its own limitation as to manufacturer-recommended maximum oven temperature, which is usually stamped right on the product. Heed those heat limits and you'll enjoy using these for years.