Matte and/or make your lipstick stay. Learned this trick from one of the other makeup artist at Estee Lauder when I worked there. Apply lipstick/liner normally, place single ply of a cheap tissue over your lip, dip a powder brush into some translucent loose face powder and brush it lightly over tissue over lips.
Take a q-tip dip it in a cap full of hydrogen peroxide and scrub on teeth leave on for 30 seconds and then brush teeth. Do for a week straight in the morning and before bed. See amazing white teeth results!