cheap Extra safety lights

I was at World Market this weekend... and there was a bin of these
little squishy kids (and ecstasy tripping) rings. They're toy ringsh
made of squishy rubber, and inside there are three multicolored LED
lights that flash. For $2 each, you can't beat it. The rubber is
stretchy enough that I wrapped one around my seatpost, one around a
rear stay, and one on my headtube. I dont know how long the batteries
will last, but for six bucks, I'm just that much more visible.