kylejang wrote on 02/21/18 at 11:02:55:Thank you all for reply. I like use handlebar bag(tool bag) as fuel bottle bag.
There are couple outdoor brands make fuel bottles - MSR, Primus, Optimus.
I just wondering is it also safe to carry gasoline while I am driving.
Let me know what you think. Thanks
I have carried MSR and SIGG fuel bottles for years in backpacks, duffle bags, canoe drybags and camping boxes. They don't have pressure relief valves, you just leave a small air space to allow for expansion due to temperature changes. Upright, laying on their side, whatever way I could cram them into the pack(s). I've never had one leak. My 30+ year old SIGG bottle has a dent in it where something was dropped on it sometime in the past but is still perfectly usable.
They are intended for fuel for camping stoves, but I see no reason they wouldn't be just fine for gasoline. They are pretty rugged, and the caps seal perfectly in my experience.
If I ever wanted to carry a little extra gas on my bike I'd use one of them, toss it in whatever kind of bag I had on the bike, and not worry about it. The camp fuel bottles are at least as strong, probably stronger, than the gas tank on the motorcycle.
I have seen, but never used, swingarm bags designed for bikes that have an outside pocket on them for just such bottles.