Roger, the non-pressurized alcohol stoves have to be the safest of the
liquid fuel types in terms of the fuel itself.

You might enjoy researching the vast variety of home-made, light-weight
alcohol stoves popular among campers. For about $10 you can buy (pretty
much free if you make one) an alcohol burner that will boil two cups of
water in about 4 minutes at sea level (where else?). Just avoid the
isopropyl alcohol you find in drug stores. These small stoves make a
great back-up stove for any boat if care is given to providing for
reasonable stability. Not that the commercial, non-pressurized alcohol
stoves have much of anything that can malfunction, but users of propane,
butane, kerosene, and electric stoves might consider them.

There was a discussion on this group some time ago about fumes from
various on-board cooking stoves that you might find interesting.

Chuck

Roger Long wrote:
I can't recall seeing anything definitive on this topic.

If that bottle of stove alcohol in your cockpit locker leaks and
drains into the bilge, how much danger is there of explosion or fire?