A swizzle stick is a small stick used to stir drinks. The original swizzle sticks were created in the 18th century at a rum plantation in the West Indies using the branch of the Quararibea turbinata. It's actually know as the swizzlestick tree.
I believe this is a Pit Bullion pour.
I don't remember where I got this though. I did not buy it direct from Pit Bullion. Maybe I got it from 
I gave this to a friend for Christmas years ago and I'm visiting that friend now, so I asked her to get it out so I could see it.
It's a pretty cool piece and quite unique.