Simple and direct mental effect you can perform anytime, anywhere!

You hand out a wine cork to your spectator. While you're looking away, the spectator holds the cork in either hand. You can tell which hand that the cork is in. The performance can be repeated.

You can perform it with short sleeves, or even BARE NAKED.
You don't need any electric devices. You can perform it forever.
No need to reset at all. You can perform it anytime, anywhere.
All gimmicks are professionally hand made.

You can perform it on close-up, parlor, street, and even on stage! You invite 4-5 people on stage and ask one of the spectators hold the cork while you're facing away. The rest of the spectators also pretend like they are holding the cork. Then all the spectators put their fists forward. You face back to them, and ask them to raise the hand in a count 3 IN THEIR MIND if they have the cork. Then you eliminate the spectators who don't have the cork in their hands. You find out who's holding the cork. But it's not the end of the trick. You ask the last spectator to hold the cork in either hand while you are facing away again. Then you tell which hand the cork's in.

"I've been performing the handling and gimmicks over years. After many improvements and refinements, this handling and gimmicks have reached the pinnacle of lean, efficient magic. The simple gimmicks, a direct effect, tiny space for storage, this trick has all the elements for the professional magic. Once you use it, you never leave it home." - SpencerTricks

The review from David J. Greene:
"VinoSense is, by far, one of my favorite effects. You hand someone a wine cork, and instruct them to place it in one of their hands behind their back. Almost immediately, you can tell which hand it is in. It's instantly repeatable! You can use it close up, or on the largest of stages. A winner all around! The beauty of this is there are no electronics, and the set up is done right in front of their eyes! It packs small, yet can play for an audience of one to ten thousand or more. I love this thing!
You get the gimmicks and DVD. The gimmicks are hand made and will last a lifetime. The DVD is thorough and easy to understand. Nothing is left out, and you can learn it in minutes.Pros: Packs small, plays big, instantly repeatable
Cons: Well, it's not really a con, but because of the size, I wish it came with some kind of protective pouch to carry it in. 
I'd give this a 10 out of 10 stars!"