Handmade with the same care as all Teaposy glassware, these double-walled 5 fl. oz. cups are made of temperature safe, borosilicate glass. They are a fantastic addition to your presentation after you've finished brewing a beautiful teaposy, loose-leaf or bagged tea. Every piece of Teaposy glassware is designed to enhance the visual experience of the teaposy and is created by hand, so no two are exactly alike. All Teaposy glassware is made from 20% recycled material. Set of 2.