This set of 12 baking cups can be used over and over again. The 2 by 3 by 1 1/2 inch cups fit in the cavities of standard metal or glass muffin pans, or they can be placed individually on a flat cookie sheet or jelly roll pan for stability. Constructed of food grade silicone that resists stains and odors, they deliver exceptional baking performance and even cooking for a variety of delicious treats everything from birthday cupcakes and fresh breakfast muffins to individual brownies, mini cheesecakes, and more. In addition, the flexible cups ensure easy removal of baked goods or molded gelatins, and their crinkled edges impart that traditional muffin edging so popular in coffee shops and bakeries. While safe for use in the freezer, microwave, or conventional oven (up to 500 degrees F), the versatile baking cups can also be used to hold colorful candies, individual party favors, or multi colored sprinkles and edible glitter while hosting a cookie making party or decorating cakes. Best of all, they feature convenient fill lines that take the guesswork out of baking. Stackable for compact storage, the set of 12 baking cups (6 red and 6 blue) cleans up easily by hand or in the dishwasher and carries a limited lifetime warranty.