: Made of food -grade silicone without bisphenol A; Can withstand temperatures from -40°F to 230°F. ideal choice for baking, lunch/snack cups, etc.: Round (1.65*1.65*1.38") 、 Square (1.77*1.77*1.38") and Rectangular (2.56*1.18*1.18") ;Silicone baking cups are safe to use for Microwave, Oven, Refrigerator, Freezer, and Dishwasher,Easy to Clean.: Comes with 3 shapes of cups for you to bake cakes of different shapes, as well as chocolate, biscuits, dessert molds, etc. It is also very suitable for separating vegetables, snacks and fruits in bento lunch boxes to prevent food confusion mixing.:The material of silicone provides better stick resistance itself, so you don’t have to use the anti-sticking spray or use paper packaging；Silicone muffin cups are naturally non-stick to make popping out perfectly shaped baked treats a breeze.:Silicone cupcake baking cups are popular with baking hobbyists. Silicone muffin liners can be widely used at parties, weddings, and birthdays, so every family needs to use them.