He's a teetotaler.

Tom is a teetotaler and only drinks Adam's ale.

Tom drank heavily in his youth, but is now a teetotaller.

Tom isn't a teetotaler.

Tom used to drink a lot, but now he's a teetotaler.

Tom is a teetotaler.

You're a teetotaler, aren't you?

Tom is a teetotaller.

My great aunt was a staunch teetotaler.

As a teetotaler, Tom dislikes being around drunks.