What where the bottles made of ?
Most of the Qantas 744 ones are steel. Some, I hear, are now lighter weight carbon(?) composites.
The necks of the pax bottles in the cargo sidewall are pointing upwards (all in parallel). The threaded connections for the plumbing are at right angles to the neck.
Perhaps the newer bottles are more fragile.. or rather, certain types of damage may be less evident. There was this concern with the fuselage of the new 787.
I can't see how something(shifting) in the cargo could impact the bottles and damage them. There will be fore-aft movement forces on takeoff, and turns should be "co-ordinated" with forces down rather than sideways. Also, if I remember correctly, there is a step in the cargo sidewall which puts decent space between the cargo and the bottles.
If the reports about a missing bottle are true, then it either got sucked out or blew itself out by bouncing off something (or deflecting off its mounting frame).