Zoku - 12oz Stainless Steel Bottle The Vacuum Insulated Stainless Steel Bottle makes sure cold beverages stay that way for up to 30 hours. And hot beverages do not lose steam, maintaining heat for up to 10 hours. Designed to take a hit, this double-walled bottle is made of heavy gauge 18/8 stainless steel, yet remains easy to carry with removable paracord lanyard. Includes: 1 Vacuum Insulated Stainless Steel Bottle Care: Hand Wash, Do not use dishwasher Capacity: 18 fl. oz.