Designed for a specific use

It is marroni season: roasted chestnuts that are sold warm, on street corners, in paper bags. People generally eat them while walking down the street, peeling the burned skin off the nut.

In Switzerland, where streets are generally cleaner, the bags (made of recycled paper) are double - and are a great example of use-specific product design: one contains the marroni; the other, slightly smaller, is for the skins, so that people don't drop them on the pavement.