EyekoEyeko Eye Do Liquid Eyeliner

BUY at Birchbox

Get a signature cat-eye look with a quick flick of the wrist. With this waterproof, carbon black liquid liner, a single stroke with the easy-to-wield pen does just the trick whether you're a liner novice or an advanced user. What's more, it does double duty, also making lashes appear longer and fuller while enhancing lash growth for three times the length and volume in 15 days thanks to the WIDELASH tripeptide-infused formula.