You will be very happy and I suspect pretty impressed with the cans, they are so much better than any other can design.
I use to carry cans on the roof rack, I left them there and just made a hose with bulb on it, like for an outboard, that way a few pumps and it will siffon into the main tank.
Those can will probably last your lifetime.
If you do carry them inside, don't worry about it much, I am sure there are stories about a car blowing up....but can't say I have heard any and I have never worried about it.
I use to carry cans on the roof rack, I left them there and just made a hose with bulb on it, like for an outboard, that way a few pumps and it will siffon into the main tank.
Those can will probably last your lifetime.
If you do carry them inside, don't worry about it much, I am sure there are stories about a car blowing up....but can't say I have heard any and I have never worried about it.