You can use an old whiskey or wine bottle, fill it up with water, and put a highlighter cartridge in it, it lights up forever!! Unique lighting people!! For camping or late nights at the beach? Leave 1/4 of Mountain dew in bottle (just dont drink it all), add a tiny bit of baking soda and 3 caps of peroxide. Put the lid on and shake - walla! Homemade glow stick (bottle) solution.