Timbuk2 Blinky Lights
Here are some great little lights that fit almost anywhere. Designed to wrap around webbing straps on backpacks, messenger bags and bike bags, these lights fit anywhere that a little bit of extra visibility would be prudent. These blinky lights are easily secured onto collars, leashes, belt loops, canes, walkers, coffee mug handles, golf clubs, kite strings, shopping carts, snow board boots, handbags and musettes.
The batteries are replaceable and the lights are water resistant. Only $7.