Shaun Pulfrey presented Tangle Teezer to investors on the British TV show Dragon's Den.
Tangle Teezer is a hairbrush designed to remove knots while reducing the pulling associated with ordinary brushes. Its flexible teeth are arranged to pass through tangled hair, and the product became known for its distinctive shape and colourful designs.
Pulfrey developed the brush from his experience as a hairdresser. His Dragon's Den appearance did not provide the investment he hoped to secure, but he continued with the idea and built the Tangle Teezer brand after the programme. The later success made the pitch a frequently cited example of a rejected or unsuccessful television pitch followed by commercial growth.
The answer is the product name, not Shaun Pulfrey, who is the inventor. It is also not a generic phrase such as “hairbrush.” Tangle Teezer is the specific brand associated with Pulfrey and the Dragon's Den appearance.