Alice in Wonderland Drink Me Bottle?

-I'm making a drink me bottle but I don't know what to fill it with. I want a pretty colored liquid but I don't have food coloring or resin. Anyone have any ideas?You could use mouth wash or nail polish remover... Obviously dont drink it! They come in greens and blues and pinks and purples. Or could just get some food colouring? Its generally quite cheap less than a pound usuallyWhisky,it tastes vile but has a wonderful colouring.. I made a drink me bottle with one of those miniture whisky bottles..remove the labeling,add a ribbon with a pretty tag on it :)
SPARKLES IN WATER
Kool Aid.
syrup?