“Chestnut”: the answer is always in your pocket.
The original pill box shaped like a horse chestnut was designed by Lorenza Bozzoli and Gabriele Chiave. It's included in the Objects-Bijoux collection. The two designers were influenced by the popular belief according which, keeping a horse chestnut in your pocket is supposed to ward off colds. The flat lid rotates on a little pivot, allowing the box to be closed with just one hand.