Toronja Sol Grapefruit Soda

I am currently on tour in California and found this at a cafe in Goleta. I love grapefruit soda so I jump at the opportunity to try new kinds anytime I can. The more sour the better. If a soda can make my mouth pucker, it's an almost guaranteed 4-bottle rating.

Is this a mouth puckering soda? Sadly no. It's moderately sour, but nothing too special. It's a decent grapefruit soda, definitely better than most.