Boxes are a kind of substitute
Lokum is popularly known as "Turkish Delight" since, in the nineteenth century, an Englishman sent several boxes to England. They're a kind of square jelly, flavored with rosewater or lemon in different colors and some have fillers like walnut, pistachio and hazelnuts, finally they are dusted with icing sugar so they don't stick together. These Turkish delicacies are available anywhere, in bazaars, bakeries, etc. Most tourists buy boxes as they're easier to travel with, but recognize that the best quality and best taste are sold by weight so the boxes are a kind of substitute.