soda water
carbonated water
club soda
seltzer
sparkling water

Two minutes earlier it would have been a club soda.

Sandy came over and I asked for the club soda.

As if by magic a club soda appeared in front of him.

Once he became drunk, she returned to straight club soda.

"I could go get you some club soda," Karen offered from behind her.

I ordered a club soda and took it to one of the little tables by the door.

But he had club soda, and poured some for his guest.

The bartender put a fresh club soda on the bar in front of me.

He would not have trusted himself to ask for a glass of club soda in his current condition.

All right, they can turn some coastal waters into club soda for a while.