The "Christmas-gift-du-jour" around here from supervisors to subordinates is Starbucks gift cards. Every year, without fail and regardless of who I work for, I get another Starbucks gift card.
I don't drink coffee though, and I'm way too lazy to drive to a Starbucks for a meal (I prefer eating home cooked meals), so the money just piles up. A few years ago we gave away a bunch, but they're starting to add up again.