I’ve tried taking fermented foods on airplane flights. Here’s what I’ve learned:
1. The rules speak of “medicinal” exceptions to the no-liquid policy. In practice, this means: (a) You need a doctor’s note and (b) you must need the medicine during the flight.
2. The rules say no gels. It turns out that yogurt is a gel.
3. What about Japanese pickles in sake dregs? When they were in a glass jar, with a lot of dregs (50% dregs, 50% pickle), the answer was no: Dregs are like gels. When they were in a plastic package (98% pickle, 2% dregs), they were okay.
A couple years ago, I found out peanut butter was also a gel.
I have always been able to get hummus on the plan. Possibly because the agents do not know what hummus is.
If the food “gel” would survive being frozen, try freezing the food into a solid to take with you on the plane. You just have to find some way to quickly bring it to a comfortable temperature for consumption.
Now printer cartridges will be banned. Because of course terrorists take about a year to conceive of packaging explosives in a new object… When they start disguising bombs as planes we’re screwed.