Food-Grade Material: Our silicone baking cups are made from BPA Free food-grade silicone with FDA approved no fillers no chemical coatings! Hi-Temperature: Oven microwave safe with up to 440F. Freezer safe up to -40F. Reusable : You could put them into your dishwasher as our easy-release non-stick cupcake liners are reusable. You never have to use environmentally damaging paper cups ever again! Multipurpose: You could make all kinds of baked and frozen delicacies you want with these flexible muffin liners for your parties such as birthdays baby showers weddings anniversaries. They can also be used as food divider in kids' Bento lunch boxes!