Calpis is the “CALPIS” is a cultured milk drink, a refreshing gift from nature.The recommended dilution for Calpis concentrate is 4:1 or 5:1 water to Calpis. I have gone up to as high as 2.5:1, but that is a bit extreme. The concentration level of pre-bottled Calpis/Calpico water is about 5:1. To prepare, just fill a glass with ice cubes, pour in concentrate to your desired level, then fill up with cold water. Stir well. Since the concentrate has a tendency to sink to the bottom, it’s best to serve this with a straw or muddler to stir it around with. People tend to either love or hate Calpis. It tastes somewhat like very sweet, thick yogurt syrup with a dash of buttermilk.