One of the best products we came across at the recent Outdoor Retailer show was the Engel dry box/cooler. They are perfect for keeping food fresh, for storing sensitive electrical equipment, cameras, medical supplies or safety equipment. They are waterproof up to a depth of 3ft, they float, and they can be used as a ditch bag.
Available in 13, 19 and 30-quart capacities they retail for a shade over 49, 54, and 64 dollars respectively