I already call it that way, but for different reasons.

My wife only drinks carbonated bottled water as she's a germaphobe and dislikes home-carbonators (I've tried everything...), but once she became pregnant I had to start dragging her bottles up to our apartment. I became very resentful of the fact that I had to either buy and drag glass or plastic bottles up to our flat only to bring them back to the store empty.

So I started calling it plastic water as a minor display of rebellion. She doesn't care though. :(