"Το κουτί έχει τριάντα σοκολάτες."

Translation: The box has thirty chocolates.

[PeterArentoft]

Now I want chocolate! :(

[ArinVeland]

Should "The box contains thirty chocolates." not be an accepted answer?

[nacreousnereid]

To contain = περιέχει. Note εχει is in the word! The περι- seems to be a prefix to mean "around", like "perimeter." Other examples include περιεχόμενο (content, like of a book) , περιλαμβάνει (to include), περιορίζει (to confine), and περιβάλλον (environment).