http://www.lifesupportintl.com/waterStorageBag.htm

Anyone know a source to obtain some for evaluation???

They show up on EBAY. Do a general search under survival.

Here are some on Ebay. Pete

http://cgi.ebay.com/ws/eBayISAPI.dll?Vie...39&rd=1

I've had these over the years, not a very good product. Over time they "decay" , the seams break and the belt loop fails. They also tend to get punctured easy and the seams will fail if overfilled. If you can't find any, PM me and I'll dig around, I may still have a few. We can work something out.

1 quart Ziploc freezer bags work pretty well if you don't overfill them. You can burst one if you try really hard, but they'll survive normal drops to the ground, carrying in a backpack if not squashed against something sharp or pointy, etc. I'd avoid using them as a primary water container unless absolutely necessary, but I've used them to carry extra water in an external backpack pocket (nothing else in the pocket to puncture the bag or get drenched if the bag breaks) and haven't had any trouble yet.

I know you are looking for these bags, but have you considered others? MSR makes their Dromedary bags, and are very tough, and can accept from freezing to boiling water, and a MSR filter pump will screw right into the fill line. Just a thought. Also, if you are interested, I bought some Gerber Breast milk bags for my PSK, and like them. They are sterile until opened, and tough. There are like 20 in the box, and I will send you a couple if you like. Just send me an envelope with return postage. e-mail me if you are interested.