By the way, Ting does not have caffiene. There are some grapefruit sodas that will be a similar flavor but nothing is quite like the real thing. There is a diet squirt...what's up in Florida? Squirt, and frankly any other I've tasted, is much sweeter than Ting. Ting has a more grapefruit tartness to it than it's counterparts. Just nothin' quite like it.
It is available in the US but rather randomly. We have a specialty soda and candy store called Rocket Fizz that carries it but no place else I've looked has it and we live in a big city. Some folks say they can't get it in their area at all. You can order it online, I found it once there before I discovered it at Rocket Fizz.