I came across this coffee a while back and again today. It was pretty hot idea back in 2007. Sadly I can't access the Objection design site as its down but it well worth doing a google search for more info on them and maybe you will find more info than I could.
Normally I blog about comporary and modern furniture you can get your hands on but this is one of those posts that I hope will get the old creative juice following.
I love the simple idea. I'm sure health and safety my have a few problem with it and I'd sugest keeping the kids away from it or design a similar idea with a clear glass or pastic covering/case.