I was wondering what your thoughts are on the use of one of these as an air chamber in a pneumatic. What kind of pressure do you think it could hold? I looked around a bit and tried to find some more technical information on them, but couldn't really find much at all. The few relevant things I found were on wikipedia.
[/img]Bottlecans are made from 100 percent recyclable aluminium through either an extrusion or Coil to Can (C2C) process to a wide range of shapes and sizes. Impact extruded bottles are produced with three times the aluminium of a traditional beer can, which provides for increased insulation. C2C bottles use 30%-40% to less aluminium than impact extruded aluminium bottles.
Other than that, they are about about the same size as a 20floz sports drink bottle (~7in tall, ~3in diameter) and have what looks like to me may be 3/4" NPT threads for the screw IN (not ON) top.
I understand these would be very unsafe to use for high pressures (and understand that "high pressure" may be relative, it may not be "completely safe" at all, and that these were not designed for anything like this so there may be no pressure rating/safety factor) but it seems like they would at least be a better option than the PET soda bottles I've seen people use.