The Bar Bottle Bet

A rattling riddle

You stroll into a bar on a Wednesday night; it's nearly empty. You settle down and order a drink. The bartender, eyeing you, proposes a bet. "Here's the deal," he says, retrieving an object from beneath the counter. He presents an empty wine bottle, cork still intact. With a shake, he reveals a rare gold coin enclosed within. "If you can get this coin out of this bottle without removing the cork or damaging the bottle, the coin is yours. Furthermore, I'll cover your drinks for the night. If you can't," he continues, his eyes twinkling with anticipation, "you'll pay triple your tab."

How do you remove the coin?