Hey all! I'm a newbie to the forums and prepping (mostly). I have acquired quite a few food-grade containers and lids from a Wal-Mart deli/bakery (mostly icing/glaze containers). I was attempting to store some wheat in them, but was unable to get the last "flap" on the lid to seal. I wailed on it with a rubber mallet, too. I was afraid I was going to damage the container, but it still wouldn't close all of the way. Has anyone else had this problem? Is there something simple I'm overlooking or are they designed to only be closed symmetrically (by a press)? I would appreciate any help. There is an almost unlimited supply available (a few at a time) and it would be nice to be able to use them for long term storage. Thanks.