Lipstick became widely popular after Maurice Levy's 1915 invention of the metal lipstick container. It was available in salve, liquid, and stick forms, and long-lasting, indelible stains were the most popular. Women chose their lipstick based on their skin complexion for a more natural look. Lip pomade, also called lip gloss, was later invented by Max Factor, Sr. in an effort to provide a glamorous appearance to actress' lips on film. Soon after, 'natural' lip gloss was created, which used bromo acid to create a red effect as it reacted with the wearer's skin. Finally, flavored lipstick was also popular, with the most popular variety being cherry.