These are quite possibly the toughest water bags available.

 I've heard amazing stories of abuse and survival of the Dromedary Bags

 Here's what MSR reckon.

"Completely collapsible for optimal packing efficiency, our burliest medium-to-large capacity water storage and delivery systems are perfect for everything from alpine- to road warrior-style expeditions. Armed with incredibly tough 500 and 1000-denier Cordura® exteriors and laminated with a BPA-Free and food-grade polyurethane lining, our Dromedary Bags can handle freezing and just bout any kind of abuse you can imagine. Accessories like the Shower or Hydration Kits add do-all versatility".

The most frequently described downside of these things as that they have a plastic taste and I agree. A fix reported online is to dose them with denture cleaning tablets or soak them repeatedly in a bicarb solution and rinse generously.