There are two kinds of juice: freshly squeezed juice and puree blended juice. Generally, what we buy in the supermarket is puree mixed with water. The puree is concentrated by squeezing juice, and some also add trace food additives to prolong the shelf life and maintain the original flavor. If it is freshly squeezed juice, it will only keep fresh taste in the same day or even in a shorter time, which is not suitable for us to buy and store in large quantities. So we usually see freshly squeezed juice in some restaurants, and the price is generally more expensive. The cheapest is basically more than ten yuan a cup. If it is too cheap, it may be mixed with water.