Emergency Water for Days!
Bought one of these a while back, I really like it, I planned to use it for rucking but I realized how heavy it got filled with water and I immediately opted for weights. It carries a TON of water and is easily transportable, just not if you're not used to carrying this weight. Wouldn't attach it to a pack, would keep this in a truck, just make sure it isn't leaky, some of them need some work on the cap. Emergency water for days!