Maybe if you cut a hole in a bin that you are using, like one of the totes, in the bottom,. and take a butterbowl lid (plastic big one) cut the lip off, or flip it, to where it's flush, then take velcro, you can buy just about anywhere , the packs that are sticky and can attatch to butter lid and bottom of tote on outside of tote, you would have to make the hole a bit smaller than lid thought, jmo...I dunno, but that's an idea? ;D