The Ritter PSP uses Kirkland Heavy Duty foil based on the video showing how they pack the kit. I saw the same article regarding leaks and immediately went to get some of our stash of Kirkland HD foil. No matter how I formed it by folding, rolling, etc. it leaked. If I formed it over my fist it didn't. Relying on foil as a water container might be a real problem. However, there's enough room in the PSP to add an oven bag or condom so I think of the foil more for signaling, fire windbreak, base to make a fire, cooking, etc. not so much as a water container.