The thunderhead waterbottle holder's webbing strap attachment seamlessly integrates with a wide range of packs and bags to keep those options wide open. How many times have you returned to the truck at the end of the day and realized you haven't had a sip of water? They've all been there. When the fishing is hot, the easiest way to remember to stay hydrated is to have options. The Thunderhead Waterbottle Holder's webbing strap attachment seamlessly integrates with a wide range of packs and bags to keep those options wide open.