My dh works in the vending machine business and he brought home a new beverage this past week that I thought may help someone with HG. It's called Flavour Splash and it's put out by the makers of Aquafina (also Pepsi). It comes in two flavours, Raspberry and Citrus. Basically, it's uncarbonated flavoured water. It's quite good except that it has a slight aftertaste of artificial sweetner (sucralose). Even though this is Canada, I would imagine it would be available in the states as you guys usually get things before us. Hope this helps someone stay hydrated....
Joanna