I'd be less concerned about flimsy-ness than smell
TORRES: I don't know about you, but I've got a case of class two claustrophobia.
PARIS: Ah, I remember it well.
TORRES: Oh, that's what Starfleet cadets used to call these class two shuttles. Fast, manoeuvrable, but not built for comfort.
PARIS: They used to shoehorn half a dozen cadets into one of these things for weeks at a time. You did not want to be around when they opened up that airlock.
"Anál nathrach, orth’ bháis’s bethad, do chél dénmha"