From the product description, check product page for current description, price and availability:

• MADE IN GERMANY HIGH QUALITY KITCHENWARE: Westmark’s Resealable Beer Bottle Opener is among the best in the world and is rated to be one of the best kitchenware brands available today.
• MATERIAL: Each product is made using high quality tempered steel with a rubber surface to ensure an air-tight seal. See below for more details.
• EASY AND READY TO USE: This easy to use product can open glass bottles as well as plastic bottles with little to no effort. If you want to put your drink on hold, simply seal your bottle by sliding the product on the brim of the glass, keeping the carbon dioxide and freshness inside. Equipped with an ergonomic handle, Westmark’s product is efficient and comfortable to use.
• EASY TO CLEAN: Simply use soap and water to clean the product.