Dip in radioactive waste water, let it dry, then place a room, turn off the lights and watch it glow.
I really don't how, but because I don't. I'll copy GuntherHess and go with the lightbulb. However you did this, don't keep us in the dark about it for long. Very unusual and very creative.
Stinger
sort of what i did is i put a mag-lite between the wall and the table i used to shoot it then i set the bottle on the top of the mag-lite i have found that it only works well with aqua's and greens and some clears if they are clean browns do the worst a dark amber bottle wont even light up