Valentine's Day. Winter birthdays. Dinner parties. Wednesdays. There's always an occasion to gift your rock star of a best friend or favorite office lunch buddy a little something special, especially when it's guaranteed to improve even the most well-rounded beauty arsenal. Enter Stila. From spring's newest and most covetable lip-gloss sets to tried-and-true brush kits, this cult beauty brand always has a knack for packaging its prettiest products in irresistible, present-worthy sets. Click through for our favorite 12 picks that we'd be proud to gift our most treasured ladies…if we don't steal them for ourselves first.