This place is called 'The Fantastic World Of Portuguese Sardines' - or O Mundo Fantástico da Sardinha Portuguesa. It's simple; find a can that has your year of birth on it and buy it! I did think on Willy Wonka for a moment considering the attire of the workers - in the end, I did not buy a can... I dont even like sardines! The place is a little odd and worth having a look for sure!