Seltzer water with flavoring (most commonly lemon) is wps. My girl always gets it. It fucking sucks. Like carbonated water with a hint of lemon. Got a 12 pack of it in the fridge now.
All the drunks (myself occasionally included) drink soda and bitters (or gun 7up and bitters sometimes) to calm their stomaches before they start drinking if they are at the bar in the morning.