This cool tray is made of cork and goes inside the neck of a wine bottle.
$51 Module R Cork tray
I think it would be a great addition to a party table. It's also a good way of using random bottles you've been saving for sentimental reasons or because you are sure you are going to get around to a craft with it someday...
It's a neat design and would make a great wedding or housewarming gift, too.