Crazy Egg Reusable Silicone Baking Cups Muffin Molds (12, Multicolor) 100% food-grade Silicone, BPA Free Can be used in temperatures from-40 degrees F to as high as 450 degrees F Easy to use ,flexible , non-toxic and reusable Oven , microwave , freezer , dishwasher safe Each cup measures 2.75" diameter at the opening, 1.6" diameter at the bottom, and 1.25" tall