This is just a layman's "feel," but if you're going to be aiming for the more exotic (stronger) stuff like polycarbonate, possibly nylon. PLA, ABS, PETG, the usual stuff either won't hold the pressure, or if they will, they will likely fracture and blow-out. PLA can be pretty brittle and you won't want shards of that stuff flying around. If you're having a service perform the printing for you, you might get good results with selective laser sintering (SLS) which fuses a very fine powder to create the model.