Lisa Eldridge shows us the eyeliners she won't leave home without, starting with her favorite classic gel liner, Mac's Fluidline ($17) in Blacktrack. When Eldridge is looking for a twist on the classic black, the opts for one of Bobbi Brown's Long-Wear Gel Eyeliners ($25). A few of her favorite drugstore liners are Maybelline's Eye Studio Lasting Drama Gel Eyeliner ($8) and L'Oreal's Super Liner Gel Intenza ($12), both of which come with application brushes for creating a perfectly precise line.