Barley water is a popular drink in Shanghai, especially during the summer months when it is believed to have cooling properties. It is made by boiling barley grains in water and adding sugar or honey to taste. The resulting beverage is light, slightly nutty, and refreshing. Barley water is often enjoyed chilled and is believed to have various health benefits, including aiding digestion and detoxifying the body. In Shanghai, you can find bottled barley water in supermarkets or freshly made barley water at street stalls and tea houses.