1)This cup is sold by the pack of 100.Made from Aluminum Foil!Very sturdy.These worked great and clean up was easy.They can be reused a few times too if you want. 2) The applications of baking cup: Dessert:Mousse Brownies,Muffins,Salads,Fruit Towers,Fruit Pie,Panna Cotta,Tiramisu,Oupei La,Corian Volumes,German Puddings,Cup Cakes,Cream Puffs,Puddings,Cheese Cakes,Grilled Cheese ,Teriyaki Fruit,Ice Cream. Condiment:Caviar,Foie Gras,Honey,Jams,Sauces. 3)They're the right size for used in birthday, wedding mini cakes,patriotic events, dinners, parties and so on. 4)Features of Baking Cup,Metallic,Colorful,Exquisite,Not fade at High-temperature,heatable in convection heating oven,microwave oven,air oven and steamer.Reducing Preparation time,Energy conservation. Can be refrigerated in ultra-low temperature,high barrier aluminum foil effectively extends food preservation. Open flame heatable,not fade. 5)The containers are perfect size and great looking.These make great dessert trays.Dimensions: Top Diameter: 3.4" Bottom diameter: 2.5" Vertical Depth:1.4"