What I found to be quite interresting and working well are the solid fuel stoves from esbit. You should be able to bring them on a flight and one small tablet lasts long enough to boil enough water for some instant ramen, soup or a cup of instant coffee.
Its gonna take some time for the apps to become more polished, the network just got a good boost in users and if the project is able to maintain those users I'm decently sure the platform will also be maturing at an accelerated rate.
What I found to be quite interresting and working well are the solid fuel stoves from esbit. You should be able to bring them on a flight and one small tablet lasts long enough to boil enough water for some instant ramen, soup or a cup of instant coffee.