We designed this streamlined, lightweight water-bottle holder specifically for the Porter 40, 55, 70 or 85 Packs. Weighing 2.01 ounces (57 grams) this 20oz plastic water bottle holder easily attaches to the daisy chains of your Porter Pack allowing quick and comfortable access to your water bottle. It includes a side release buckle for attaching into the daisy chains on either side of the pack and a locking shock cord to secure the bottle into the holder.