Lipstick ring

To not get lipstick on your teeth you put a finger between your lips and pull through. This will remove the product located on the inside of your lips and prevent it from transferring to your teeth. It also leaves your lipstick like a ring on your finger.

Girl 1: The lipstick keeps getting on my teeth!
Girl 2: Just put your finger between your lips and pull through.
Girl 1: Yes, but that will give me a lipstick ring on my finger and this lipstick doesn't come off easily.