What is Hugh Hefner's favorite cola?

This looks like a reliable source:

Hugh Hefner's favorite drink? Jack Daniels and Pepsi. He consumed more Pepsi than some small nations.

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Take the case of Hugh Hefner, now 87 years old.
The Bunny Master drinks up to 30 decaffeinated cans of Diet Pepsi a day.
His favorite drink is Jack Daniels and Pepsi.
He used to take his Pepsi caffeinated.
According to Hef’s Little Black Book, 2001 … “He [Hefner] is a Pepsi Man. Actually, he is a Pepsi Generation unto himself. Famously, through the sixties, he was photographed swigging from Pepsi bottles; butlers in his homes were always instructed to provide a new bottle if they saw one half empty. Or if he was seen without a Pepsi in his hand they were to immediately fill that hand with a Pepsi bottle. He would drain three dozen bottles a day, caffeinating himself royally. In 1962, it was reported that his annual Pepsi consumption equaled that of a small African country.”

https://oneradionetwork.com/atoms-blog-articles/longevity-according-to-the-wet-behind-the-ears/

As is his habit, Hefner chain-drinks decaffeinated diet Pepsi from the can, having eaten lunch earlier: toast and protein drink. Some days he drinks up to 30 Pepsis, leaving a trail of cans behind like cigarette butts. Ever the gracious host as king of his castle, Hefner sips happily while his guest eats seared sea scallops with angel hair pasta in pernod sauce.

http://jessicaseigel.com/articles/hefner.shtml