if I have, I use the original empty box. If not, I use small cardboard boxes. I keep every complete set of Panini World Cup since 1974 (only almost complete set for Mexico 70), every complete set for European Championships since 1980, and some special collections (National Leagues 1981, because I was born this year, some 1st edition of National Leagues, World Championship Ice Hockey Panini 1979, Panini Formula 1 1980, and some collections of my childhood of the French League of the 80s / 90s)