X-PAC Mountaineering Bottle Holder (Lightweight/Stylish/Shoulder Fixed/X-Pac) ¥5,990 (Tax Included) Used only once in the field. Held a 500ml PET bottle and Nalgene without any problems. I'm selling it because it didn't quite fit my needs. (The following is quoted from the manufacturer's website) https://store.yamatabi.shop/items/45589692 This is a lightweight bottle holder made of X-PAC that securely holds bottles and can be attached to the shoulder harness of a backpack. The mesh pocket with gussets on the side of the bottle holder allows you to quickly and systematically replenish nutrients by storing amino acids, citric acid, salt tablets, etc., along with water. Weight: Approximately 41g Size: Bottles with a diameter of 9cm or less Material: Dimension-Polyant X-Pac® VX21