Ok, now I have a few questions......moisture in bag like with corn....this could present a sealing problem? Could I par freeze on cookie sheet, then vacseal to prevent? Or how about putting a folded strip of paper towel on top of corn before sealing, then as moisture is being sucked up to top it is absorbed into paper towel, thus letting it make a tight seal? I was hoping this gadget would help me preserve fresh veggies to carry thru winter, like corn, tomatoes, berries,but now reading about moisture, I wonder....... Or why put something in a regular ziploc, then put in vac bag and seal....does it suck the air out of that little bag with the stuff in it within that sealable bag? I thought the purpose was to eliminate air?