Several stove makers have found that, energy drink cans, with the twist off aluminum caps, easily adapt to re-sealing the stove after burns to save the fuel without having to drain it off into separate fuel bottle, by simply screwing the cap back after a boil;
In the course of "twist-on, twist-off" too many times the cap eventually starts to grind
the threads away , as the container was not designed by the manufacturer for multi or re-use.
In the Plastipot thread, (http://www.backpackinglight.com/cgi-bin/backpackinglight/forums/thread_display.html?forum_thread_id=88873)
I show a similar stove that I designed and printed a Plastic cap for (both ABS (black) and modified Butadiene (clear) was used) , to replace the original one that had started to get a little hard to re-apply easily:
I replaced the original blue plastic liner with a blue silicone one, but if you allow your burner to cool after use , the original liner will probably hold out.
The plastic cap seems to seal very well and weighs only 2 grams more than the original
cap , which weights 4 grams.
The use of plastic (and the capillary design, along with other thermal isolation) in the stove body helps to thermally insulate the stove from the cold
and can be placed directly on a cold surface with minimal reduction in heat output of the stove.. (Hard to see flame in the daylight)
The Nanokettle pictured was used to test burner outside (-4c) as it doesnt need a windscreen in light winds , the black back drop pictured was simply to highlight steam plume
at first boil…
The .stl file (file needed to print cap using 3d printer.. Find a Friend who has one! Takes about an hour to print) can be downloaded at:
