Arts&CraftsFilter: How do I make a solid look like a liquid?

Make it shiny, paint it with gloss polyurethane.

Is it a liquid that dries to a solid, or is it a solid from the beginning?

When I think of a liquid in a glass, I think of something with a somewhat reflective surface that's perfectly flat on top except for surface tension pulling it up slightly at the edges. I'm not sure if it's appropriate for the project but a "drop" or two spilled outside the glass may aid the illusion.

I have seen kits to make fake stained glass where you melt clear plastic beads and they look like stained glass when they cool again. You could presumably melt these in a container and may be cheaper than the acrylic water contrariwise linked. Gel wax should also be available at some craft stores or specialty candle stores. I have seen some pretty convincing beer mug candles, for example. These may technically be a liquid, but are solid enough to hold upside down.

Could you use Jell-o?

Is it a liquid that dries to a solid, or is it a solid from the beginning? It doesn't have to be a liquid that dries to a solid, but that would be preferable. The container I put it in may have a narrow neck. Could you use Jell-o? Seems like Jell-o might attract unwanted friends.

http://www.google.com/images?hl=en&source=imghp&q=gel+candles&gbv=2&aq=f&aqi=g10&aql=&oq=&gs_rfai=CHFrN0JQZTP-XHYfAzQS3rZWfAwAAAKoEBU_Qy-uI, maybe?

I've had good luck with hot glue (like glue-gun glue)... I just made some doll-sized champagne glasses using this trick. To create a coloured liquid, I painted the bottoms of the glasses with yellow paint before I dumped the glue in.

You probably want to try http://www.ehow.com/how_5852017_pour-liquid-plastic-resin.html, which you can find in any craft of hardware store. I think you can color it with dye or food coloring, also. Oh I just found http://www.theburningbiscuit.com/blue-glass-water-bottles/ from googling and it seems to be exactly what you want to do! Will you make me a Zelda potion bottle?