Drink one cup a day, and you will definitely gain weight in the long run. Where is the milk tea? They are all additives. You can say whether there is milk or tea. Traditional milk tea won't make people fat. I usually make my own milk tea. The ingredients are only milk (skim milk is afraid of obesity), black tea (tea bags are also acceptable) and sugar (no added). The taste of milk tea made from these three things is definitely not as good as you said, but if the quality of black tea is good, the taste will be more mellow, the taste will be fragrant slowly, and the calories will be low and healthier. It may not be like milk tea outside.
If you are afraid of trouble, you can try the so-called online celebrity milk tea, which is a tea bag made of a bag of milk powder and some sugar. Some of them are very good, and the calories are not so high, which is healthier.