This needs to depend on the situation. If it is properly preserved, you can drink it overnight, otherwise you can't drink it. Because the main ingredients of milk tea are milk, tea and sugar, they can only be kept for a few hours at room temperature, and if kept in the refrigerator, they can usually be kept for about 12 hours. So it is advisable not to make too much milk tea to avoid wasting it due to storage problems.
Some people say that homemade milk tea is unhealthy and harmful to the body, which is wrong, if the ingredients of homemade milk tea are healthy, drinking it in moderation is not harmful to your health.
Homemade milk tea is usually made by individuals themselves, they will try to choose some good quality materials when making milk tea, such as: the best milk, good taste of tea, etc. Therefore, and the market does not know the source of the production of milk tea, homemade milk tea is healthier, under the premise of the right amount, you can rest assured that you can drink.