100% Waterproof Apple Ipod Shuffle with Waterproof Headphones - Superior Swimming Mp3 Player (Newest Generation) (BLUE)
I really like my Apple Ipod Shuffle.  It took a while for the play/pause button to function correctly, but once it had been 'broken in', all functions properly.  This one works better than a previous one that I had purchased from another company that had costed more.