In the early 60's, the Milk Marketing Board had a very catchy advertising slogan on the go that went - DRINKA PINTA MILKA DAY. It was used on TV, bill boards, magazines etc and in fact, the actual word pinta has since gone on to become part of everyday language.
The photo of the city centre above dates from the early 60's too, the entire square being used as an outdoor cafe, complete with wooden chalet and serving area, and on top of the stripy canopy it has the very same slogan.
As the 60's progressed, so did the advertising concept, developing variations on the pinta theme such as introducing Pinta People (Pinta Girls, Pinta Men), the idea being that if your were one of the Pinta People you'd be healthy, cool & trendy, in keeping with 60's swinging London!
They later came up with a similar slogan to the original which can be viewed in the TV ad below, which dates from around the mid/late 60's. This time they have it as - A PINTA PER PERSON PER DAY.
Photo by DC Thomson.