When referring to airline baggage handlers, indestructible is a relative term. I'm sure it will be since there is almost no weight inside. Good luck with it. How much were the materials?
I habitually exceed design requirements.
I'd guess that if I built ten of these, and threw them all off a ten-story building, about half would crack and in no cases would the prints be damaged.
10' of 6" diameter PVC pipe: $42.50
. Used only 30", cut on table saw.
2 pc of 6" diameter threaded adapters: $23.50
2 pc of 6" diameter threaded clean-out plugs: $10.00
Way overbuilt for mailing, but just "overbuilt" for going as checked baggage.