Thanks, but I think folks may be getting a little hung up on the PSK-side and maybe see this as an either/or situation. We discuss everything from PSKs, FAKs, BOBs, Trunk Kits, Home kits, 72 hr, etc. Basically these can be any configuration you wish. I hope people did not take the above to mean replacing a pocket PSK with a one-quart bottle system. As a container, I think the 1 liter bottle is a great thing. I carry mine daily...in an OR parka. In fact, I even carry a few full to work daily. If it came right down to it, a condom, breast milk bag, etc are great in a pinch, but to be honest, I'm always carrying a 1 liter Nalgene and I'd be using it. They're extremely durable...I still have some in rotation after 15 or so years. Additionally, my cube at work could harbor just such a kit and not want for space. Again, stuff in a PSK like fishing gear I wouldn't be using at work, or even to get home in an emergency. I work a good distance from my home...sometimes a great distance. I have multiple layers (and redundancies) of EDC for home and away. These can be effective modules. Additionally, I carry extra. In an emergency I have given out items. I got a good deal on these lexan bottles a while back and use them for storage anyway. I now wish I'd bought more. I hate to sound like a cheerleader, but my packouts are incomplete w/o 1 liter lexan nalgenes. Packing the bottles just allows me an even more efficient use of space.