Has anyone tried these adapters to allow your propane gas bottle to be filled at filling station LPG pumps?
The device costs about £38 but it seems to me that to fill my little 3.9kg bottle costs about £8 at the LPG pump, or £16 at Calor Gas stockists. Therefore after about five fills you are in profit, so those who live in vans, use gas-greedy fridges or use a lot of gas for heating are going to be in profit pretty quickly.
It is also easier if you run out suddenly on a cold night to find a filling station than a gas stockist who has your size and make of bottle available.
Of course, filling my dinky 3.9kg bottle is less economical than those with the bigger types, but if you can get cheap gas almost anywhere at any time you needn't cart so much of it around with you, saving fuel and space.
I'm wondering if you've had experience of this type of device.