Economy Jade Glass Coaster glass material. Reusable or disposable earth-friendly. A must-have multi-functional accessory for your home, this round coaster can cater to all your beverage needs! Its flat shape is perfect for pockets, It also works well as an incentive, gift or giveaway item during your marketing events.also we can put your logo,company ads on the coaster,so this Glass Coaster coaster will give your brand plenty of exposure!It's unique product,welcome to enquiry!