The standard issue topcase from Yamaha holds a ton of ice, is insulated and doesn't leak. I wish i had a picture for ya. After a good days ride with 4 other friends i was voted to go get refreshments, mainly because i had the bike most capable of doing so. I emptied the gear out the topcase, went to the store and bought an 18pk and a bag of ice and dumped them both in it. When i got back I simply unlocked the case leaving it closed and walked away from the bike. They all looked at me funny, and one guy said you forgot something... :dribble: I said go help yourself it's in the topcase. You should have heard the howls of delight when they saw all that beer sitting pretty on ice. :yahoo:
The next day i took a towel and wiped it all out. It was cleaner than when i started, and the double wall on those topcases is perfect for use as a cooler. I still had ice in it the next morning. My next farkle is a bottle opener.