Bat Purse Accessory. Complete your ultimate bat girl look with this awesome looking bat purse costume accessory. Carry all your knick knacks in this adorable bat purse costume accessory. This bat purse costume is great with the very bat girl costume or any gothic girl costume. Need something to hold your cell phone at the Halloween costume party but do not want it to clash with your costume? This is a great costume accessory to carry all your essentials.