We just spent the weekend out on our C-30 and tried something new. We put our soft-sided ice chest in the ice box and then loaded it up. I was amazed at how cold everything stayed. We had a couple of those blue ice things plus a bag of cubed ice. Some water from the ice cubes dripped onto the blue ice packs, froze and was still there 24 hours later! Granted, it's not summer yet, but the temp was in the high 70's and we motored quite a bit.