From cocktails to candles, we've rounded up the best 21st birthday gifts for her. Some high level ideas are a piece of jewelry, a bouquet of flowers, a trip to a favorite destination, a sentimental piece of artwork, a special piece of clothing or accessory, or a thoughtful keepsake or memento. For the young woman who loves to have a good time, you could also consider tickets to a concert or show, a gift certificate to her favorite bar or nightclub, a subscription to a cocktail or mixology service, or a set of her favorite wines or spirits. Other ideas could include a gift card to a favorite salon or spa, a cookbook or kitchen gadget for the aspiring chef, or a new set of makeup or skincare products. Ultimately, the best gift will be something that shows the recipient how much they are loved and appreciated, and that reflects their unique personality and interests.