What to give guys in their early 20s for Xmas?

[Cancuk]

some nice bottles, dependent on what they drink.

[renodoc]

If they drink, you could buy them a *nice* bottle of something that they would never purchase themselves. You will endear as the favorite uncle.

Uncles are allowed to give cash for holidays and birthdays. Not such a good idea for your girlfriend or boyfriend, but uncles can get away with it.

For more details, see the relevant Seinfeld episode.