You are just sucking some air out, creating a partial pressure differential, not creating vacuum, the absence of air or other matter in gaseous state, as in space. Under near vacuum, all water and other liquids (including some valued lower terpenes) would evaporate (vacuum desiccation); the material would dry completely, to 0% relative humidity. Obviously, that is not happening, and whatever air pump you have is not a real vacuum pump.I’m curious as to why you do not consider something sealed with a vacuum sealer as being truly vacuumed sealed. I seal foods and perishables in mason jars and plastic bags with an electric vacuum sealer and they would not stay as fresh if there was still air in the container.
Messing around with vacuum can be very DANGEROUS. Glass jars could easily implode. Take a look at glass vacuum desiccators and see how thick their glass is.