1. Booze
    You know her favorite drink, right? So one of the coolest best friend gifts you can give her is sauce. If she’s a Cosmo girl, grab all the necessary components (don’t forget the lime juice!) and pick up a chic cocktail shaker she can leave on the counter at home. If she prefers wine or beer, find something new or local to try or go with what you know she loves but never splurges on for herself.