Whether you're trying to look pulled-together on a hot day or during a hot night out, it's always a challenge to keep your eye makeup from melting off and forming messy, gunky creases on your lids. Enter the Bobbi Brown Cream Shadow Stick, which you can buy for $20 here. This thing is a veritable magic wand for making eye makeup stay put. You apply it like foundation before putting on your other eye makeup, and it creates a dry, matte surface that makes eye shadow go on smoothly and stay put without the ugly creases. With the shadow stick, your eye makeup will look flawless even after countless hours dancing in a sweaty club. The only problem is that the stuff works so well, you have to get your eye shadow right the first time—or wash off the foundation and start all over.