🧁【Oven safe】The maximum temperature is 420°F and longest baking time is 20 minutes. | 🧁【No Baking tray needed】-These muffin cups are made of premium quality aluminum foil that make these strong and sturdy. Put them into the oven and bake them directly. | 🧁【Microwave Inapplicable】Can't be used in microwave as metal material easy to catch fire. | 🧁【Eco-friendly Material】anti-stick and oil-proof, flavorless, clean and environment-friendly, disposable and fashionable workship. | 🧁【Size & capacity】diameter 2.7" X height 1.6". 3.5 oz. Perfect for baking cupcakes, muffins, cheesecakes, cake, and for appetizers, nuts, candy, snacks, dips, and more!