The encyclopedia · Marketing & Brand · Marketing decision · 1985
Coca-Cola replaced its own 99-year-old formula, and America revolted for 79 days
200,000 taste tests said the new formula was better. The tests never asked how people felt about losing the old one.
The Coca-Cola Company · 1985-04-23
What happened
By 1985 Coca-Cola had spent 15 years watching Pepsi win blind taste tests and shave away market share. The company's answer was Project Kansas: a sweeter reformulation that beat both Pepsi and original Coke in some 200,000 taste tests. On April 23, 1985, chairman Roberto Goizueta announced the first formula change in 99 years. Old Coke was simply discontinued.
The backlash was immediate and theatrical. The company's hotline went from 400 calls a day to over 1,500. Protest groups formed, people hoarded cases of the old formula, and a Seattle activist filed suit. The complaints weren't really about taste — Coke had data proving the liquid was fine. People were mourning something the taste tests had never measured: the drink was part of their identity, and the company had taken it without asking.
Seventy-nine days later, on July 11, executives brought back the original as 'Coca-Cola Classic'. ABC interrupted General Hospital to break the news. Classic soon outsold both New Coke and Pepsi, and the company's market position ended up stronger than before the blunder — leading to a conspiracy theory the company has denied ever since: that the whole thing was planned.
Why it happened
- The research measured sips in a hallway, not habits, identity, or the emotional cost of losing a default.
- Discontinuing the old formula turned an upgrade into a confiscation — no choice was left on the shelf.
- Blind taste tests favor sweeter formulas in small sips; a full can drinks differently than a sample cup.
- Fifteen years of losing to Pepsi's marketing created pressure to do something big rather than something right.
The lesson
Data answers exactly the question you asked. If you only test the product, you will be blindsided by everything the product means.
Aftermath
New Coke lingered as 'Coke II' until 2002. The fiasco is now taught as a masterclass in market research scope — and, because Classic's comeback boosted sales, as the most profitable failure in beverage history.
Sources
- The Story of One of the Most Memorable Marketing Blunders Ever — Coca-Cola Company
- New Coke: The Most Memorable Marketing Blunder Ever? — HISTORY
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