I'm becoming allergic to plastic! I'm really learning to hate the stuff - for storing food. Its impermeability means with temperature changes, it sweats. And if your corn is in it, and it sweats....... I've been keeping whole field corn for the geese in 2 plastic buckets, yesterday I was horrified to find the plastic bowl I use for a scoop/measure was half full of WATER. Well, the bucket lid I had on there has one of those openable holes on it for pouring paint, and I think that developed a leak. Maybe it got pecked by a jay or something. The grain on top was dry, but I Wasn't Too Sure About This, and poured it out until I got to the bottom which was wet all right! I put the super-wet stuff out on the field for some lucky finder, the wet-ish stuff into a wooden bushel basket with a grain bag over the top and into a location that's dry but has lots of WIND riffling through, lots of air movement. Air movement is the KEY to getting stuff dry. The very driest went into an open cardboard box and into a location without tons of wind but some air movement. If I had room in my place, (I live in 200 sq. ft.) I'd just keep the grain in here. Impermeable substances are just BAD NEWS for storing grain. Cardboard, wood, etc., breathe. This means .... Hmm ... those wooden barrels used in the old days are looking pretty good. Those baskets you get for cheap at thrift stores, lined with cloth could be good. I harvested a LOT of walnuts in the fall and I have them in pillowcases - cloth breathes. Walnuts need to dry and we had a wet spring, it took some learning to figure out how to get them dry enough to bring inside - in pillowcases and turned over frequently at first - for final drying. I also put just a little spritz of pyrethrin-based bug spray on the outsides of the pillowcases. Walnuts can get buggy! Right now those are stacked at the head of my bed lol. I had open cardboard boxes turned into trays, holding my half of the popcorn harvest, stacked up for a while, an inch or two of popcorn in each one and stirred just about daily, it took time but the stuff dried enough that it pops. Now it's in cardboard box. No mouse problem because mice don't want to live with me. Plastic is just too much of a moisture-magnet. I think galvanized steel, with some provision for air movement, is the way to go. Like a galvanized trash can, with some stainless steel mesh in the bottom so air can move.