What should I do next to this Coke cup? My dad bought me some awesome Coke glasses. I'm not gonna...

My dad bought me some awesome Coke glasses. I'm not gonna use all of them, so I considered necessary to keep one in my room. I'm not sure what I should put within them though, other than liquid. What should I put within it? The glass is very shrunken, so if it breaks, I want whatever is inside not to be too messy. I don't want it to get stuck within the floor, either. I was thinking of some red and brown rocks, approaching at the bottom of fish tanks. The smooth ones,not the rubber pebbles. Here's what it looks like:

http://i282.photobucket.com/albums/kk278...

http://i282.photobucket.com/albums/kk278...
How do I soundproof a room using egg...
Answers:    you could buy a few sticks of lucky rattan and create your own arrangement with some of the rocks. that would look cool. not much water would hold to be put in, so if it breaks, it's not too awful messy.
How do i fix wood color minus removing...
I saw one of these once where a guy have poured brown paint into the glass (coke colored) then empty it, effectively painting the inside of the glass making it look as though near was coke in it. Then he full up it up with that expanding foam stuff you can buy at any DIY store and let it foam over and some down the side of the cup, then with a bit bit of tweaking (cutting, trimming, painting, etc.) it looked like the cup was full of coke foaming over and spilling onto the table.

Very creative I thought.

Anyway, enough of my ranting, failing this, you can other put it in the glass recycle bin.

Enjoy!