Trunki is the Dragons' Den product that functions as a child-sized suitcase that can be ridden through airports.
Trunki was designed by British product designer Rob Law as ride-on luggage for children. Its shape allows a child to sit on the case and travel short distances while holding a handle. The design addressed a familiar family problem: keeping young children moving through airports while also carrying their belongings.
Rob Law presented the idea on Dragons' Den, where the dragons did not invest. Despite that rejection, Trunki became a commercial success and was sold internationally. The product is associated with colourful moulded plastic cases, child-friendly styling and the distinctive ability to be pulled or ridden.
The most common confusion is between the product and its creator. Rob Law is the designer and entrepreneur; Trunki is the brand and suitcase. The question asks for the product name, not the name of the person who pitched it.