MAMMUT Mammut Drink Holder - Blue Lightweight and practical bottle holder for the Lithium backpack series. The outer fabric is made of recycled nylon, and the lining is made of recycled polyester. Can be attached to the hip belt or shoulder straps of a backpack. Adjustable size, can hold up to a 1-liter bottle. The Lithium Add-on Bottle Holder is a lightweight and practical bottle holder for the Lithium backpack series. The outer fabric is made of recycled nylon, and the lining is made of recycled polyester. It can be attached to the hip belt or shoulder straps of a backpack using belt loops and hook-and-loop fasteners. Adjustable size, can hold up to a 1-liter bottle. You can take it out immediately when you need it.