Help with secret santa

Hey guys, we happen to do secret Santa gift at work. You don't know who will be the colleague to whom your gift will be assigned, all you know is the sex female or male with a number assigned to the sex that will help the management to indicate who the person is on the day D. So what kind of gift do you think will be more appropriate in this case. We all go along well at work and always help each other to achieve the daily goal. Just need help, or will be my 1st time ever to participate. We will have a little dinner party that day. Thanks