I'd get the CamelBak Antidote (cheaper option) or the MSR Hydromedary (more expensive). I've always used CamelBak and never had any issues, but the MSR one looks really nice as well. I use MSR gear for cooking, etc, and it holds up well. Honestly, they will probably perform about the same, so it's a matter of money. The MSR one does has holes in the top (so you can hang it), which could be nice depending on the intended use.

http://www.backcountry.com/camelbak-antiodote-reservoir

http://www.backcountry.com/msr-hydromedary-hydration-bag