Hmm. I keep my corks in a gallon ziplock baggy. When I went to bottle my Merlot and Cab, I noticed slight discolorations in the cork and when I tested one and pulled it back out. The slightly discolored areas were breaking apart. I immediately put off bottling and ordered more corks. This is after only a year of sitting in the ziplock bag. It makes you wonder if using foodsavers would help. Air tight is definitely better than just a plain ziplock, but how much better vs corks drying out. I know Mike said he kept the humidity up and he too still had a problem. I really want branded corks, but I really don't want wasteful spending or even more, wasting natural cork.