The shelf life of milk tea pearls is generally 3 to 4 hours after they are cooked. During these hours, they can be stored at room temperature without storing in the refrigerator. It is a short-term preservation method. Once these hours are exceeded, the pearls will generally start to harden without any waxiness. If it has exceeded the good shelf life of 4 hours, you can add boiling water and boil for about 2 to 3 minutes, and then rinse with cold water, which can extend for about 2 hours, but the taste of the pearl will not be so good at this time. The boiled milk tea pearls can also be preserved with preservatives. This preservation method can be used to preserve the milk tea pearls for at least ten days. But this method is not recommended, because doing so will affect the taste and is extremely harmful to the body.