Patio Diet Cola
Diet Pepsi was introduced as Patio Diet Cola in 1963.
In 1964, Patio Diet Cola was renamed Diet Pepsi.
The text is almost the same as the 2008 logo.
This logo is now in use for Diet Pepsi's classic sweetener blend since 2016. (Only the Diet Pepsi text is used.)
Compared to all the Diet Pepsi logos, this logo was the shortest-lived, which was in stores for just over two years.
When Pepsi started to rebrand, they used different version of the logo to fit with the mood and flavor of the drink. For Diet Pepsi, it has a slight grin.
The grinning globe was later replaced with the regular "smiling globe".