Lattein opened in February 2026 and specializes in milk-based beverages, offering a range from classic coffee lattes to their signature black latte. Partnering with L'Arbre à Café, they prepare espresso drinks on a La Marzocco machine. Prices include espresso at €3, Americanos at €4.50, and flat whites for €5. Open seven days a week, the café features seating and plant-based milk options, catering to the growing specialty coffee scene in the residential 15th arrondissement.