One cup of coffee in the morning improves cognitive function and decreases the risk of depression. Many new styles of coffee have come to Vietnam recently including aeropress coffee, siphon coffee, and cold brew coffee. One of the newest styles of coffee is Nitro coffee, which combines biochemical technology with coffee brewing. With the ample foam, nitro coffee is also called "draft coffee". Its flavour offers a natural and pleasant sweetness. Nitro coffee is expected to enhance Vietnam's coffee market.