Insulated cooler compartment with drain.Very fuel efficient - I can run over 100 miles on the 24 gallon tank. At trolling speeds you can troll all day on < 1/4 tank..Very stable boat in wind and waves. I often fish Lake Erie and Lake Michigan and feel safe staying out in 3-5 footers. On a number of occasions I've had to travel back in 4-6 footers.