To maximize ROI, choose machines equipped with an IoT-based remote monitoring system. This allows you to track real-time milk levels, internal temperature, and sales data via a mobile app or PC. Features like adjustable dispensing volumes (e.g., 200ml to 2L) and multi-payment support (IC cards, banknotes, coins, and mobile payments like Apple Pay or Google Pay) are essential for user convenience. Furthermore, an automatic bottle-washing module or a built-in bottle dispenser can significantly increase the machine's utility in high-traffic areas.