I bought these for a friend for Christmas, and nearly kept them for myself they were so cool. Coming in a set of 4, each glass is a different color so you can pick you favorite shade, or avoid accidentally polishing off your colleague's wine (or was that an accident?). They website says they are currently unavailable, but I suggest they are worth the wait.

These are sure to confuse and scare your guests as they are made with a slightly off-center base which causes the glass to rock gently in place. Great for swirling that wine while your two hands are busy with the appetizers. (via ShoeIn)

I could just see the look on guests' faces when their drink glasses start rocking to and fro. These tumblers have off-center bases that cause them to gently sway but with no risk of actually spilling their contents.

These are pretty and great for entertaining. (via Name)