We use several compressed gas bottles in Spinlab. Each of these bottles is secured to a wall when in use and transported on a tiltable cart with four wheels. Of course, when the bottles are being transported, we make sure that the gas bottle cap is securely screwed onto the top, because we don’t want this to happen:
We recently had to replace one of our empty gas bottles. Surprisingly, we found an old wasp’s nest in the cap!