A folding bicycle helmet. The folding helmet, based on card – has been crowned the international winner of this year’s James Dyson award, having already won the national prize in the US. Resembling an accordion ball Christmas decoration, the helmet can be flattened, while a honeycomb structure, visible when unfurled, gives it strength. “It is one size fits most,” said Shiffer. “These [helmets] are quite sturdy and the honeycomb stalls are arranged in such a way that they can protect the head from a blow from any direction.” [Source: https://www.theguardian.com/lifeandstyle/2016/nov/17/folding-bike-helmet-wins-james-dyson-design-award]