Lowerlobe; it is not air but oxygen used in medical and aviation bottles.
Additionally, the comment does not make sense. Simple physics tells us that with any pressure hgher than atmospheric pressure in the bottle, no outside air or moisture could possibly get in.
I believe the company tells you to not let the bottles below 100PSI. This is because it is enough (being higher than atmospheric pressure) to keep air from entering the bottle.
And i don't see any problem with the idea the bottle was sucked out. Imagine the amount of air rushing through a relatively small hole, i suspect the air velocity would be more than high enough to blow the bottle towards the hole and out into the atmosphere.
The thing i find amazing is how many people love to suspend reality and common sense and indulge in the most ridiculous conspiracy theories!