What are the examples product of negative demand?

Sure..."Don't DO that!!"

Negative demand in marketing is when a product is selling well below expectations. Such figures reveal that the product is costing the company in terms of shelf space and item movement.

One classic example is that of "New Coca-Cola". While soft drink companies change their formulae all the time, Coca-Cola made a big fanfare in an effort to sell more product. The unexpected outcry over the change resulted in a severe setback of the company. This in turn, led to a massive announcement that "Classic Coke" would return, complete with a nostalgic packaging. New Coke became a benchmark of negative demand.