Take a 20oz mt dew bottle with 1/4 left in it, Put it just a pinch or two of baking soda and 3 cap fulls of peroxide. Then shake it up and instant glow in the dark bottle.
I think I am going to give this a go tomorrow. Something to entertain myself at work.
I don't know about the rest of you, but i tried it.... maybe i've got old peroxide, or mixed it in the wrong quanity. But it didn't work for me. Tried different amounts of baking soda and peroxide 3 times. No luck as of yet. :-(