You know your new bar will have plenty of inventory costs, but did you know that by marking wine glasses you could prevent over pouring? Thousands of business dollars are wasted each year due to wait staff pouring too much wine and other drinks into the wrong glass. To prevent over pouring drinks, use liquor pourers, jiggers, and measuring guides. Ensuring that your staff uses the correct wine glasses for each drink coupled with liquor pourers can save your business thousands of dollars each year. Try having your bartender keep a wine glass with a grease pencil lined at the appropriate level to use as a guide to prevent over pouring.