Yankee Swap gift ideas?

Yankee Swap gift ideas?
I am an intern at a smallish biotech company and was invited to our department's holiday lunch where we will be doing a yankee swap. We have a range of between $20-25 and the majority of my co workers are in their mid to late 20s, with our supervisors 30-50 years old. I know many are planning to do alcohol but I'm not 21 yet so I can't give that. Any ideas?