I thought this was kind of funny from that website you posted:
Anyway I tested my snorkeler quickly using propane but didn't accomplish much because I need a sparkplug. What I did see seemed promising though. I'll just have to keep testing and modifying.This demo should only be performed using a plastic jug. The large quantities of gases (H2O and CO2) produced during the very rapid combustion could easily shatter a glass container.
BTW do you think it would be worthwhile to make a similar snorkeler with a cone inside like the conventional reynst? I have no time to make it now, but that would be something interesting to experiment with eventually.