You could also contact your local council to see if they accept gas bottles at your local recycling centre. (recyclenow.com)
The idea of hauling gas bottles on my sled, seems wrong. (tinyhousebuild.com)
Ahead of my rack is a pile of strapped - down N2 gas bottles used in the trace gas studies, and to my right is the cylindrical gravimeter, measuring about 1 meter in diameter and 0.6 meters high, covered in an attractive dark - blue form - fitting insulating blanket and looking like an expensive piece of furniture. (lablit.com)