I did a fairly large show this past weekend. The weather turned cold at night. It got down to 36 degrees before morning. You could see your breath by 10:00 when the show ended at night. Well, in the morning when I opened my tent, my jars were all wet. My 16oz apothecary jars were fine but the 12 oz masons are going to have to be all relabeled. For the life of me, can't figure out why just one size jar would do this.