What are some things that one can own or buy when one turns 18 in the US?

A friend of mine just turned 18 and I thought it would be funny to get her a gag gift filled with things that you can only use or own when you’re 18. So far, my plan was to put cigarettes, a porn magazine and a military application forms in a bag for her. Are there any other odd little things I can include in this present of 18-year-old absurdity?

For you buzzkills out there, I don’t expect her to do anything with all of this stuff. It’s just been a running joke between us and everyone at work that she was underage so we had to “be careful” around her.