9 Must-Have Beauty Products to Add to Your Makeup and Skin-Care Routines

Likely the most essential makeup product, a liquid eyeliner instantly adds a little drama (the good kind) to any makeup look. The Lancôme Ultra-Precise Waterproof Liquid Eyeliner ($22) is rated nearly five stars, with over 300 reviews claiming its stellar performance at defining the eyes and seamless application. It glides on smoothly and has up to 24 hours of waterproof wear, which means you can wear it poolside or on your next beach vacation.