GuS stands for “Grown-up Soda” and claims to be “Not Too Sweet”. The Star Ruby Grapefruit flavor lives up to the billing. The soda is a cloudy pink color, and there is a small amount of sediment in the bottom. There are no specific admonitions on the bottle, but a gentle agitation of the bottle before drinking is indicated. It has a quite refreshing, tart citrus flavor, not purely grapefruit (it is mostly grapefruit and orange), with light carbonation amounting to a strong fizz on the tongue. Sweetness isn’t absent, but it’s not the cloying sweetness of too much HFCS - one could almost suppose that it’s no more than the natural sweetness of citrus fruit. There are seven other flavors in the line; I’ve seen “Dry Pomegranate”, “Dry Valencia Orange”, “Extra Dry Ginger Ale”, and “Dry Cola”; the website claims those plus “Dry Root Beer”, “Dry Meyer Lemon”, and “Dry Cranberry Lime”.
I’d want two of these, not one, but it’d be a great referesher on hot days. It would also make a nice palate cleanser.
Sold in four-packs of 12oz (360ml) bottles
7.5 Cal/fl.oz.(25.36 kcal/100ml)
Sweetened with cane sugar
ETA: I find this at a food vendor in the Dining Court at Grand Central Terminal, and also at a nearby Fairway supermarket.