While bachelorette party favors are not mandatory, they are a fun way to give your bridesmaids a memento of your last girls’ night out before the wedding. Your gifts need not be expensive -- they can be funny, useful, or a reflection of your party’s theme. If a wild night of bar-hopping is what’s in store, then give them something on the more amusing side, such as a sexy thong or a personalized flask. If a movie night in with popcorn and ice cream is more your speed, pajama bottoms or comfy slippers are both cute and practical favor ideas. Other popular bachelorette favors include: a set of nail polishes, aromatherapy kits, certificates for manicures and other spa treatments, and potted herb plants.