"I'll have a glass of glass please"

Last night I was out with my wife Mae for Valentine's Day and we stopped by a mexican food joint on our way to see Benjamin Button. It was at the mexican food joint that I had a margarita or a glass of glass. Not sure yet. But near the end of the drink I happened to find a glass chip the size of sunflower seed in my drink. At first I thought it must be ice but it had such a pointy shape. I sucked on it and it did not melt. It was glass. For our trouble they took both drinks off the bill. Whew. That's good. As long as there wasn't a chip or two I drank without knowing. We'll see.