Question: do you have to refrigerate clamato juice?
Answer: After opening, Mott's* Clamato* should be refrigerated and used within a 2 to 3 week period. You say you've got pure clam juice (i.e. stock/broth). Clamato has a ton of acidic tomato concentrate as well as sugar (corn syrup) that acts as a natural preservative, and it only claims to last a few weeks in the fridge.