Which controversial food product launch from the 1990s featured unnaturally colored ketchup varieties and ultimately failed despite initial sales success?

In the competitive food industry, not every marketing campaign is a recipe for success. Some product launches and promotional campaigns become legendary for all the wrong reasons. This trivia question focuses on one of the most notorious food marketing disasters of the 1990s that fundamentally changed how food companies approach product innovation and consumer testing. Test your knowledge of this colorful culinary catastrophe that became a case study in business schools worldwide!

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Heinz EZ Squirt Colored Ketchup (purple, green, and blue varieties)
McDonald's Arch Deluxe (the 'sophisticated' burger marketed specifically to adults)
Crystal Pepsi (the clear cola that promised 'purity' and transparency)
Frito-Lay WOW! Chips (made with Olestra, causing digestive 'side effects')