After The 1967 Oringinal Release In Ohio (As In The 1970's) Pringles Started Selling Across America Along With Two New Flavours. Salt And Vineager And Sour Cream And Onion. Sour Cream Be Came The Most Popular Flavour And It Still Is Today. It Contains A Blend On The Flavoursome Onion With The Popular Sour Cream Dip. Pringles Described It As

Sour cream and onion never tasted so good. A perfect blend of onion and sour cream deliver a crisp that’ll tantalise your taste buds. A taste sensation that balances green onion taste with sour cream delight to make the perfect snack to share with friends, heading to a party or simply when you want your taste buds to be tantalised. New perfect flavour in every bite.

Pringles sour cream and onion