★ Imported and sold under an authorized sales license from Zpacks. ★ Immediate purchase is welcome. Thank you for viewing. This is the Zpacks Water Bottle Sleeve bottle holder. Below is the official website description (translated): The Water Bottle Sleeve is a great way to balance your pack and have easy access to water. Designed to fit most popular tall, slim 1L bottles like Smart Water, Body Armor, and Essentia, this sleeve can be attached to the shoulder strap of any backpack. Size: Approximately 3.25 inches in diameter x 9 inches in height (8.3 cm x 23 cm) Capacity: Fits 1-liter bottles up to 3 inches (7.62 cm) in diameter.