Different tea shops use different milk to make milk tea. I worked part-time in COCO tea shop in college. The milk they use is completely refrigerated milk. This kind of milk tastes fresh and has a natural milk smell. When making milk tea, you can smell the aroma of milk as soon as you open the bottle, and it feels delicious without any seasoning. This is also part of the reason why COCO milk tea sells well. Moreover, the whole frozen milk has a long shelf life and is not easy to waste milk. After all, it is very important to control the cost of opening a tea shop, so the whole frozen milk is quite suitable for tea shops.