When I use the plastic bins for anything, I drill about 3 holes under the handles in order to add more air to the boxes.
I talked to the guy from Texas who makes those beautiful glass front/oak wood quilt cases and I told him they need air.
If they were in a area, say next to a heater in the winter, or as the sun moves around the house, if the sun hits it at all,
then the quilts stored in there are in trouble. We have to SAVE OUR QUILTS, ladies.