For when I use Alcohol stoves:
I use a small Listerine bottle (I have a small Evernew 550ml sidewinder set-up), which tucks up nicely into my coiled sidewinder cone....great for one to two night trips.
The advantage of this is that the bottle is relatively flat, so I can tuck it into my jacket (if I need to keep the bottle warmish/warmer) without noticing any annoying bulge. Plus, it has a safety cap to reduce the likelihood of accidental opening.
Listerine bottle...with approx. 80ml of fuel.
Listerine bottle coiled inside cone.
Whole kit, including fuel, stove, half pack towel, lighter, measuring cup and mug (modified sippy cup) ready to be packed away.
If I want anything larger in volume, it goes elsewhere in my kit. :-)
Edit: Added another photo. Plus, the label on the fuel bottle should read Ethanol, not Methanol.