Sounds like an interesting shower, some of these ideas might work in a redesign.
http://www.nytimes.com/2011/12/03/us/at-84-square-feet-home-takes-tiny-house-movement-tinier.html?nl=todaysheadlines&emc=tha23
Cool ideas :)
Thanks for the into. It is one of the best explanations about the difference.
I use the Snow Peak Baja burner in my FlipPac, uses iso-butane and works great