Precision fitted for a 40oz Hydro Flask, Takeya Originals & ThermoFlask or Fifty/Fifty Protects your stainless steel bottle from dings, dents and scratches. Suppresses the clanging/clinking noise. SUPERIOR MATERIAL Injection molded TPU is built rugged for active lifestyles. Unlike comparable products made of silicone, TPU is more durable and will not stretch and tear. Furthermore, it is non-porous so mold cannot penetrate the surface. ENHANCED INSULATIONBottleGuard also serves as an additional layer of thermal insulation. Whether you are in the mountains, beach or desert – your drinks will stay hotter or colder for a longer period.UNIQUE DESIGN Extra thick upper lip for an airtight seal and added protection and grip. The unique textured diamond pattern enhances grip retention so your bottle stays in your hand when you work up a sweat. The base is thicker for greater shock absorption. No need to gently set your bottle down anymore because you now have a built-in coaster. The special internal rib design makes it easy to slide your bottle in. QUALITY & EXCELLENCE We are confident once you use BottleGuard and experience the benefits, you will never want to take it off. Whenever you want to remove it for cleaning, just follow the directions below: CARE & MAINTENANCE For easier removal, rise or soak in hot water for approximately 1 minute. The sleeve will then loosen due to heat expansion. Grasp at the base end and twist off. Wipes clean easily with a damp microfiber cloth. We recommend using Mothers VLR for periodic upkeep of the TPU material. With proper care & maintenance, you will enjoy the benefits of your reusable bottle year after year while helping the environment.