I think freezing pot makes it brittle and crumbly, or at least it always has mine.
This
sealer works great. I just fill my jars loosely (full, but not stuffed) with nugs, use the pump, then store those in a dark, cool place. Last step in cure. Mold needs oxygen.
Seems to kinda put the buds in suspended animation, where they never DRY out.
I like that.