where can i purchase in san antonio, tx?
Try this online store: http://www.britsuperstore.com/acatalog/Five_Alive.html
The Coca-Cola Company doesn't really sell 5 Alive in the U.S. anymore, so this website can have it shipped to you from the UK. If you have a problem with ordering online then I suggest asking your local grocery store if they have it in stock or if they can order it and have it shipped.