Statement from Heinz on Whether or Not You Should Refrigerate Ketchup
Because of its natural acidity, Heinz® Ketchup is shelf-stable. 
However, its stability after opening can be affected by storage conditions.
We recommend that this product, like any processed food, be refrigerated after opening. 
Refrigeration will maintain the best product quality after opening.

You've heard of red wine and white wine but have you ever heard of blue wine? This blue version of wine is given a taste test to see how it compares to the classics.