A few years ago, Vlasic Pickles teamed up with Walmart to sell a gallon of pickles for the unheard of price of $2.97. They sold over 240,000 gallons of pickles a week. Vlasic loved the sales numbers, only to discover that profits were shrinking by 25% or more, since they only made a penny or two of profit on each jar. Vlasic filed for bankruptcy in 2001.

This story (fully described in Fast Company December