I'm with several other, we just use ziplock bags for food items and put ontop of the ice. The beer goes in the bottom under all the ice for sure.

I bought one of the igloo ice cubes, the smaller square one without wheels, and It fits great in the middle of the back bench seat on the floor without getting in the way, plus a cold one is within reach at all times.

If were going out for several days in a row, like we did on Memorial weekend I use the cube cooler for drinks and the under the bench seat cooler for food, etc. But we still just use ice and ziplocks for the food.