[quote=“Otaku, post:6, topic:2620”]IIRC the original camelbaks were made with a thick plastic that would not break, but was flexible like a plastic bag.
Maybe it might take a higher level and something like this:
Tailoring 4
Tools: Sewing kit (20-ish), knife, soldering iron (10)
Materials: Backpack, rubber hose, rags (2), plastic bags (4)
What do you think?[/quote]
The design I posited was supposed to be just a general survivors’ hybrid backpack/camelbak, more on the backpack side, sorry I didn’t clarify that.
Yours looks fine. I’d still say switch out with plastic bottles or a gallon jug instead though, while camelbaks are made of superior, thicker plastic bags as already mentioned, I have had them pop before during strenuous stuff. In such a situation would you risk carrying something made out of crisp packets or shopping bags when you have perfectly good PET bottles lying around? 
of course, instead of hauling loot an actual camelbak would be perfect for long exploration or combat duties in cata, as they are very, very easy to wear.
You could certainly wear a backpack or rucksack over the top without incident.
Make an actual camelbak I’d go for -1 or maybe even -2 encumbrance. maybe 4 volume storage, and 2~l water, having it function as a canteen/clothing?
