Food-Grade Silicone: Made from soft, high-quality, oil- and heat-resistant silicone; safe for air fryer, oven, microwave, and freezer use. Multi-Purpose Baking: Perfect for eggs, muffins, cakes, bread, sandwiches, pot pies, chocolates, yogurt, pancakes, and more; large 2.6" size holds extra fillings like veggies, cheese, or bacon.