Vefa Bozacısı still displays a glass that Atatürk is said to have drunk boza from, kept on show behind glass in the shop.
A thick, faintly tangy drink fermented from millet or wheat, boza is served cool in winter, topped with cinnamon and a handful of roasted chickpeas (leblebi) on the side. Vendors still walk Istanbul's streets after dark in winter, calling out for customers the way they have for over a century.