Pibb Xtra is a reformulation of Mr. Pibb that was released in summer 2002. This is NOT Xtra. This is real-deal original pre 2002 Mr Pibb. Anything sold as "Pibb" in a store now is "Pibb Xtra".
Next time you think you see Mr. Pibb, check carefully as you will see the word "Mr." does not appear anywhere on the product. Also remember that many fountains serving "Pibb Xtra" never changed the label from the old "Mr. Pibb". Ask the restaurant to confirm the selection by checking the concentrate canister or bag-in-box and you will see.
Full cans of Mr. Pibb!
Check this site for other long lost sodas!