This is one of the pavilions where the Expo message comes across best. The theme tackled by the [Swiss Pavilion](http://www.expo2015.org/en/participants-countries-switzerland) is abundance and its opposite (namely, shortage of resources). Four towers which, in May, were full of coffee, water, apples and salt. Each tower has different floors/levels and the plinth they sit on is periodically lowered to guarantee a replenishment of the products following a monthly cycle. A guide takes visitors on a tour of the four towers, telling them that they can help themselves to as much as they want but with a warning: that their behavior will have repercussions on availability for the visitors after them. Put in another way: you can take as much as you want, but when a given product is finished, it's finished for good. Moral of the tale: to date, the towers containing the most enticing products have been emptied within a few days (even if more slowly than in May). The message is clear, but the temptation (to take “a lot” home) is too strong. So Switzerland succeeded in its intention: the message is loud and clear, and at the end of their tour visitors can't help reflecting on their own and others' behavior. With respect to the theme of the Great Universal Exposition, the Swiss Pavilion has been the most successful of all.