Why do people NOT use small aluminum pressure cookers for camping....? Yes, they are heavier than titanium, but not much heavier than a good 1.5 qt. aluminum Pot & save fuel weight. On a fly-in, drive truck to, or boat drop-off hunt they would use far less fuel & boil water five times faster......? I see that they make pressure cookers as small as 1.4 quarts. So why are they not used....???