A souvenir to us is specific or unique to the location. It is a memory, a memento of something you saw or experienced during your stay. It is the feeling of taking a little piece of the place, the culture home. It provokes stories and should be functional even if the function is decorative.
A little-known fact about Sofia is that the city lays in a valley with over 30 mineral water springs and countless taps and fountains with good drinking water spread around the city. In the local folklore there are many tales and believes surrounding the benefits of it. So much so that still today people wait in line with big plastic bottles to fill and bring home.