So the wife cuts her foot just as we go to spend a week on the beach. The thought of salty sandy stuff rubbing into a cut on her foot and shoe is just not a nice thing.  So in search of a waterproof barrier solution she starts thinking "What can I use to cover my cut that is water proof?"  The answer, of course, is Duct Tape - you know that stuff they make into wallet shapes and sell at hardware stores?  So in searching for Duct Tape to apply over her bandage what does she find but....."Duct Tape Bandages"!  Rats, we were beaten to a great design idea by someone else.  The photo is not faked or photoshopped but the actual  product we bought off the shelf at a drug store.  The bandages worked ok, sea water and sand are a difficult combination for any adhesive, but the concept is brilliant!