The meniscus (men-IS-cuss) is the thin edge of wine at the top. The meniscus forms a kind of ring where the wine touches the inside of a wine glass. By tilting the glass at a forty-five degree angle and looking down at the meniscus, you can get an idea of a wine’s age. The lighter the meniscus, the older the wine. For example, if a cabernet is young, its deep garnet color will extend from the core of the wine all the way through the meniscus to the inside wall of the glass. If the wine is significantly older, however, the core will be deep in color, but the meniscus will be significantly lighter (as in the picture).