The fuel I use now on my Origo is a yellow-coloured, denaturised alcohol (ethanol). It is probably much the same as the BnQ stuff that Mark Thomassen mention below. It holds 80% alcohol, and I buy it in one-litre bottles in a local hardware store. The bottles make it easy to fill the canisters of the Origo.
To fill a canister, I take it out in the cockpit and fill it there. Any spills can easily be washed away with water. With one litre filled on an empty canister, the cooker can be heeled much further than you would heel your boat during sailing, still without spilling any fuel, so as long as you fill the canister in the cockpit, and wipe off any spills, there is no way the Origo will have a crazy flame-up.
The 80% alcohol keeps most of the flame blue at a higher power-setting than when using the 96% stuff. There is also less soot on the kettle. I have tested the time to boil 0.5l of water, and to my surprise, the 80% alcohol is just as fast as the 96% version.
The greatest long-term advantage with the Origo is to me that there are no critical parts which need maintenance. Simple as a hammer.
Arne
PS:
The only ‘technical’ issue is how to open the cooker to get at the canisters.
There is a little catch in the middle of the front of the stove, which must be pushed in to release the top half. In addition, both burners must be set to zero to free the lid. This you will do not only to fill the canisters, but also to fit or remove the rubber pads on top of the canisters. These pads are used if some time goes between use (days).
It will soon become second nature to do this.