✴ This product is a sports water bottle cover case compatible with 0.8 to 1 liter bottles. I purchased it, but I'm selling it because I don't plan to use it. ✴ The strap is adjustable, and the hook makes it easy to remove. The inside has a cushioned silver sheet sewn in, which seems to have a cooling effect. ✴ Brand new, unused. ✴ Size: Bottom diameter: Approximately 8.5 cm. Case height: 23 cm. Strap length: Approximately 66 cm. Strap width: 2.5 cm. ✴ Nylon material.