Lovely idea this. Simply attach to the side of the bottle (it's magnetic!) and let it track the contents and warn you when the bottle is nearing empty. We like this as it often happens that we run out on a site with very expensive cylinders or, worse still, none at all. They are surprisingly accurate too.
Buy one now and keep it on your 'live' bottle, swapping it over when you change for a full one.
We also list online deals such as:
- Gas hose for butane regulators
- Aluminium camping stoves
- Cheap folding camping tables
- Gas regulator spanners for butane and propane bottles
- Butane cylinders for sale