I was in Southaven Walmart today as the lady in sporting goods was finishing putting the containers of worms in the cooler. She had 3 boxes that they were delivered in. I asked if she was going to throw they away, I'll take them.
There is a Styrofoam cooler with lid inside the box. The inside edge is fluted to hold the round worm containers upright. There is a frozen gallon jug of water in the center. The bottom of the box has a slot to hold the jug upright and a slot in the lid to hold the jug handle.
I figure they will help transporting frozen foods to camp or use on the boat to keep fish in.