I'm a water bag convert. Was sent one hydrapak for free as part of a group trip, and I've now bought this second one as well. The bag is well made, seals perfectly, and doesn't drip even when the nozzle is open unless you give it a good squeeze to take a drink. I love that it folds down as you empty it and can be rolled up and stowed when empty. I was worried the water would taste like the bag- after using it a few times, there's a subtle taste, but it doesn't bother me, and I'm guessing it willSee full review