Check out the “Let it Snow” Xmas 2020 Group youtube project!”
It will not fit into the overhead luggage compartment on an airplane, but Upton Bass has developed a travelling acoustic string bass that nests into a rather (considering the contents) small utility case. Assembles in about 15 minutes. Think of the body of a string bass as sections of a Russian nesting doll, and you get the idea. I don't know if the bow collapses so that it will fit into the case as well (if not, I know how they could do it).
Without deviation from the norm, progress is not possible. —Frank Zappa
The future is already here—it’s just not very evenly distributed. —William Gibson