Personally, I would recommend decanting the tap boxes into glass jars.  The plastic tap boxes will not be great over time with certain blends, as the oils in the snuff will begin to degrade the plastic.

However, if you’re adamant about vacuum sealing the tap boxes, make sure you don’t over do it.  Too much vacuum will crack and crush them, and the oils in the snuff will absorb into the labels on the outside.  You may also end up with shattered plastic inside.  Ask me how I know 😏