The best grapefruit soda is the one you like best! In our testing, we found that Fever Tree made for the prettiest pink cocktail. But we really enjoyed the tart, slightly sweeter flavor of Ting. If you like things more sweet, then you may prefer Jarritos. Both Ting and Jarritos make for a lighter pink cocktail (vs. Fever Tree), but the grapefruit flavor will still come through.