What they thought of next

Eric Aeberhard, from Switzerland, looks through the rubber device he designed to facilitate opening and closing screw-top bottles Photograph: Fabrice Coffrini/AFP

Denis Thevenin, from France, demonstrates his invention for viewing one's head and hair Photograph: Fabrice Coffrini/AFP

Slovenia's Aleksander Polutnik rides a self-balancing electric unicycle Photograph: Fabrice Coffrini/AFP

Heina Gruber, of Germany, presents his invention, a hot-air rotating grill, in which meat, fish and vegetables are roasted vertically Photograph: Martial Trezzini/EPA

Paul Fischer, of France, presents the Cervical Stretcher – an exercise and therapy device for people with cervical problems Photograph: Martial Trezzini/EPA

Brazilians Amarildo Miranda Melo and Edemar Antonini pose with their invention, an economical toilet apparatus that flushes with only three litres of water instead of nine Photograph: Fabrice Coffrini/AFP

Italian Enrico Berruti with his self-making-bed invention, which has two lateral arms for handling bed linen Photograph: Fabrice Coffrini/AFP

Pascale Pittet, from Switzerland, shows her invention, a plate with removable compartments enabling its user to monitor calorie intake and portion size Photograph: Fabrice Coffrini/AFP

Cosimo Letteriello, an Italian, poses with his invention, the Trespolo - a case with a tripod that turns into a workstation Photograph: Fabrice Coffrini/AFP

Fabrice Leblat, of France, presents his Leblatphone, a portable speaking machine programmed with several languages, for non-native speakers Photograph: Martial Trezzini/AP

Marie Gumpper, of France, presents her invention, the Rosbox – a kind of reusable packaging for fresh flowers, especially roses Photograph: Martial Trezzini/EPA

Taiwan's Ryan Liu poses with his invention, an interactive instant message-based toy that changes its face according to the smiley received on a computer Photograph: Fabrice Coffrini/AFP