Have you ever heard that in the 70's Delmonte launched his ketchup and Heinz answered by launching an advert with 3 ketchup bottle upside down. The first bottle was a Red gold (totally empty), the second one was a Delmonte ketchup(half empty)and the third one was the Heinz ketchup (nearly full).

I read that in a website but the writter just heard about that from a friend. Can you confirm that this story is correct ?