If it doesn’t have a filter, it’s not authentic Vietnamese Iced Coffee!
Vietnamese iced coffee, also known as cà phê đá or cafe da (Vietnamese: cà phê đá, literally “ice coffee”) is a traditional Vietnamese coffee recipe. At its simplest, cà phê đá is made using medium to coarse ground dark roast Vietnamese-grown coffee with a small metal Vietnamese drip filter (phin cà phê).