So Ive been thinking about this for a couple days. Those 13 kids stuck in the Thailand cave are running out of time, with new rain coming next week and oxygen levels decreasing. I was reading yesterday that they are trying to find 5 mil wet suits and it just really felt like they were waiting for a perfect situation to act. Its not going to be perfect, but they are going to have to take action soon.
Im a scuba diver, and what little I know about cave diving, I think it there is just no way you could expect those kids to swim out on their own power through that route, they will need to be towed or chaperoned out.
This is what I have been thinking about. Could probably make one in 1-2 hours. Reusable.