You never know when you'll need some extra light, but you don't want to keep clunky laps or even flashlights for those rare times -- enter Jesper Jonsson's collapsible lantern. Conveniently compact, it folds up tightly, taking up no room at all.
The best feature of Jesper Jonsson's lamp, however, is the fact that it's solar-powered as well. With a handy strap, it can hang folded when not in use to absorb as much of the sun's energy as possible. Therefore, you will never be left in a light-less lurch.