I've noted on a few threads some of you chaps carry a little extra gas/petrol in a container which is affixed to some part of the bike. This is something I would consider doing but living in an area that often gets 'really' hot, I'm understandably concerned about the safety of this.
Can I ask what you guys are doing in regards the container you are using, where/how you are mounting it etc?
I have the Triumph Pannier bag that I mount this above the bag and tie it down to the mounting bracket for extra safety. I just did around 500 miles this past weekend with it and it was perfect. Didn't get too hot and was far enough away from the exhaust.
Here is what I have. I ordered from Amazon in the US. I used a piece of rubber hose to protect the frame tube from being chaffed. I also used extra heavy duty wire ties to secure the strap. I haven't had a need to use it, but good to know it is there.
This is my setup. I purchased the leather bottle holder from a leather guy in the UK and ordered the 30oz fuel bottle off Amazon. Very happy with the setup, but it wasn't cheap. Here are the links to the holder and the bottle.