Hi: This isn't about saving lettuce but about cooking it!!! We borrowed a friends 40' MoHo but needed extra fridge space so we borrowed another friends Koolatron plugged into the cig. lighter. All the crunchy veggies pre cut and two heads of lettuce fit in it.
Getting out of the drivers seat I kicked out the plug on the side of the cooler, so I just reached down and lo an behold it wouldn't fit back in so I tried it upside down and it fit...TaDa. Fixed... right...wrong!!! How was I to know it heated as well as cooled
Alf S. North shore of Lake Erie