Casino Chips

[jmn32]

Hi, I'm from England and I'm going to Vegas for the first time in a few months, and I'm just wondering about the rules regarding casino chips leaving the casino building.

Let's say I'm playing in a small no limit game and I think to myself "these $1 chips are pretty nice, I'd like to take one home as a souvenir" and slip one in my pocket. Is that acceptable?

This is a serious question, I have no idea if this is illegal / frowned upon / common practice.