I tried it out for a week camping. It's ok if you're not willing to spend much, as it does hold water during carrying and when stationary. However, the tap screw thread on the carrier is just a thicker version of the same cheap plastic the carrier is made of, and flexes easily, meaning it would probably leak if not kept upright. Since the tap is at the top, it's also really awkward to pour as you have to tip the whole carrier on it's side - and the weak plastic bulges all over the place. Pouring is a two person job, ideally.