So now may start tours w/ 2 bottles HEET and, when bottle1 is emptied will start looking to buy another.
I do something similar, but different enough to merit telling you about it.
I feel that gear for bike touring has to be durable enough to take a good whack. You never know when you will take a fall or hit something. So I use a conventional fuel bottle for my opened alcohol bottle. I feel pretty confident that foil on the top of the HEET bottle provides thet needed seal. I am less confident about the HEET bottle once you peel the foil off.
As for fuel bottles, alcohol is supposed to be corrosive to aluminum. Trangia makes a nice plastic fuel bottle. Others make an epoxy lined aluminum fuel bottle. MSR fuel bottles are not lined. I have an 11 ounce MSR fuel bottle that I sometimes use. I no longer use it for white gas, and I check the bottle for corrosion. You will have to decide what standard you want to follow. I wrap my windscreen around the fuel bottle.