I used one of these my first season, it worked ok but I wanted to see inside.
http://i968.photobucket.com/albums/a...s/PICT2648.jpg
Then I used a coke cooler last season
http://i968.photobucket.com/albums/a...s/SDC10355.jpg
My friend took his coke cooler home and I built this
http://i968.photobucket.com/albums/a...s/PICT4939.jpg
Welcome to the addiction :D