If you wear lipstick, blot your lips with a tissue before drinking from a glass to avoid leaving your lip markings on the edge of the glass.
Sometimes it is impossible to avoid leaving a lip mark on a glass even if you aren’t wearing lipstick. If you notice a lip mark, try to drink from the same spot each time so you don’t leave your mark around the entire rim of the glass.
Men are not excluded from this rule. Many of you wear a lip balm to protect your lips from sun and wind damage. Please follow the same protocol as the ladies do for their lipstick.