A mug for 1 euro. Seems so cheap, doesn't it?
But you know, there is something else you can get for one euro that is even better value. A bus ticket! You can take a bus anywhere in Alpes-Maritimes for 1 euro and the Alpes-Martimes is a big area - you can visit Nice, Antibes, Cannes, Grasse, Mougins, Vence, Vallauris, Roquefort-les-Pins and of course all the places nearer to Menton like Roquebrune and Sospel and Monaco.
Good value, I'd say.