Jack, the comment was in refernce to those who cook omelets in bags – where the bag is floated in simmering water for long periods, such as 12 to 20 minutes. While it works, you have to make sure the bag does NOT touch the pot as the heat involved will melt the bag. It is something I do not recommend doing.
As for popularity? We sell more books every year and I can barely keep up with production of FBC cozies. Not bad overall. Part of this is due to people outside of the internets finding us. A precentage who do FBC meals are not UL hikers by any means.
I don't do just FBC, hence why we run TrailCooking.com – it is though my baby and will always be. On many meals I offer 3 sets of instructions – FBC, insulated mug and one pot ways.
In the end though, we all generate waste by hiking – unless you carry your meals in fabric bags and wash them that is…..

