LOCOMO Fluorescent Wishing Sand Bottle Phone Strap Charm Wedding Favor Mini glass bottle filled with fluorescent and shells Let it under light in day and it will glow at night You may even put your own stuff inside the bottle. Bottle size: 0.6 x 0.6 x 1.2" / 1.5 x 1.5 x 3cm Strap Length: 2.8" / 7cm