>>2637116I also think you could go on r/ULgeartrade and sell caps like pic rel to plug the female end of Sawyer Squeeze filters so it can be made water tight and brought to sleep with and not worry about a zip lock tearing.
Figure out a way to tether it to the filter if you wanna make it fancy and charge more.
Do all that, and get setup to make recycled filament to print them with, and I guarantee those yuppies will eat them up for $7 a piece.
I would if I had a 3D printer