I'm still a little confused as to which bottles are good for meths and which are not. I'm guessing an old nail polish remover bottle will be fine.
Ethanol is more chemically aggressive than naphta-based fuels, paraffin and petrol.
That may be true in certain cases (for example, H2G2 notes
its effect on certain carbon-based life forms) but as far as containers
go, if you can keep vodka in it, you can keep pure ethanol in it.
And in my experience, the 10% wood alcohol in meths doesn't
change that.
I'm not quite sure what you mean?
The Trangia ones are a bit big, albeit safe.
what's wrong with the bottle your meths came in?
if it's too big you might want to try a hip flask, don't confuse it with your "non essential bushcraft item" hip flask though or you might end up burning all your precious booze.
I have used many different plastic bottles from Insect repellent containers, contact lens fluid bottles, to drinks bottles to what i use now Body shop 150ml bottles (i think they were shower gel).
150 ml does about 2 full burns on my "coke stove".
I've never had a case of plastic melting, or cracking, or anything else. and I've used meths all over the place. If you aren't sure try small amounts in a bottle before trips
Only thing i would say is choose a bottle with a see-though plastic so you can see how much you have left!
(just for the record I've done the same with petrol and again never had any problems)!
I'd be interested what plastic does melt or whatever with meths!