How to make something slightly similar (yet still nothing-like-the-
real-thing) to Josta:
1. Go to a local supermarket that carries Goya food products.
2. Buy 1 each of Strawberry and Guarana Goya Soda.
3. Mix them both together in even quantities, or add slightly
more of the Guarana depending on your preference.
I think, of all that I've tried, this is the closest thing to Josta. It's
berry-ish and has Guarana, but that's about it. There is still a
factor X that distinguishes the real thing!
If you have ANY info, facts etc, about Josta that you'd like to share,
please e-mail me!