Which famous literary figure had a notable endorsement deal with this product?

The intersection of literature and advertising has created some fascinating partnerships throughout history. Major authors have occasionally lent their names and reputations to commercial products, sometimes controversially. This trivia tests your knowledge about famous literary figures and their unexpected commercial endorsements. Can you identify which author-brand partnership actually happened?

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Ernest Hemingway endorsed Ballantine Ale with the tagline 'When you're out of Ballantine Ale, you're out of beer'
F. Scott Fitzgerald was the face of Brooks Brothers' 1925 summer collection, appearing in magazine ads wearing their signature seersucker suits
Virginia Woolf recorded radio advertisements for Waterman fountain pens, claiming they helped her maintain 'a stream of consciousness'
J.R.R. Tolkien partnered with Wrigley's gum for a 'Fellowship of the Flavor' campaign shortly after The Lord of the Rings publication