Pets.com — Online Pet Supplies in 1999

Pets.com burned through $147 million in venture capital, including $1.2 million for a single Super Bowl ad, to sell low-margin pet food online before broadband reached most homes. The company survived only 268 days after its IPO, making it one of the fastest flameouts of the dot-com bubble. Its failure cost 67% more than the average e-commerce startup of its era, and unlike the clever but flawed Juicero at #1, Pets.com had no viable product—just a sock puppet mascot.