Paper cup, a blank for a paper cup, and use of a paper cup

A paper cup for holding liquid, comprising:

• a base;
• a sidewall;
• said base and said sidewall together defining a space for receiving liquid or food;
• an upper end portion of the cup comprising a first and second pair of opposing closure panels, whereby each of the closure panels is attached to an upper edge of the sidewall via a respective first folding line, and each of the closure panels of one pair is attached to the closure panels of the other pair via respective second folding lines;
• said closure panels being foldable into a closed position to form a lid of the cup;
• each panel of said first pair containing two additional folding lines, each of which extends from a distal edge of the respective panel to end points of the respective first folding line, to enable folding inwards;
• wherein, upon folding to the closed position, a first panel of said second pair is partly inserted below a second panel of said second pair, and the panels of said second pair close the upper end portion;
• and
• wherein the lid is concave in the closed position.