Cosmopolitan: Liners That Last

"Best: SMUDGE-PROOF

Eyeko Eye Do Liquid Eyeliner, £15

An easy-to-hold pen with a medium-sized, tapered felt tip, this is one of the easiest liners to apply and one of the most intense blacks around. It's not waterproof, but won't crumble or smudge until you remove it with oil.

Inge, beauty Director."