While drooling over the Flora Grubb website (if you haven't seen it, you will want to) I found some lovely teacups planted with succulents. Tab and I decided to give them a go - easy really, just find some old tea cups (mine are from ebay), fill with some succulent potting mix, stick them in and see how it goes. You should probably drill a hole in the bottom for drainage but at the risk of cracking the cup, I think if you're careful not to over water then it should be ok. I also added some white stones on the top for a finished look. Hours of amusement in our house.