On a recent kayak junket I had the opportunity to follow Lifehacker’s advice on waterproofing electronic gear. I bought three condoms, and after the first two ripped I left the third in the men’s room for someone who was feeling lucky.
Of course there must be some tougher rubbers than the ones I was using. I wound up using two zip-lock sandwhich bags and managed to stay out of the drink.
In my mind a better alternative would be to use a dry bag. I’ve had great luck with dry-bag stuff sacks while canoeing and it seems like an electronic dry bag such as the Lewis N. Clark Waterproof Multi Purpose pouch Large