Seven Dragons' Den 'failures' that went on to earn millions Previous slide Next slide 1 of 8 View All Skip Ad. The concept of Look After My Bills is simple: you sign up just once, and the service finds you a great deal (and switches you to it) every year. Not every pitch on CBC’s Dragons' Den lands an investment deal, but the exposure alone can send sales skyrocketing.

In true punning style the Dragons declared the Tangle Teezer brush to be a ‘hair-brained idea’. With the dragon's support, the company was able to launch all over the UK and abroad. They each turned down the possibility of an £80,000 investment, and in doing so closed the door to one of the most lucrative recent developments in the hairdressing world. Pulfrey claims that he knew he'd lost the Dragons when Deborah Meaden denied having her hair coloured. From a useful gadget that lets you grab things in hard-to-reach places to fancy dog collars, we’ve picked 12 interesting and unique products recently featured in the Den. The HEFT remains one of the best Den success stories to date, and it’s hard not to be moved by pitcher Marco Longley’s story. Look After My Bills co-founders went into the Den and wowed the Dragons - walking away with the BEST deal in the history of the popular TV show. Two Dragons - Jenny Campbell and Tej Lalvani - invested £120,000 for just 3% of the company.