I have tried a few 開奶茶 before. Some of them don't work. At last my friend told me to buy in Kowloon City. That one is very good. My daughter does not have "pat pat" everyday. Sometimes only twice a week and it's very hard and smelly. But after she took the 開奶茶 from Kln City, she eat very fast and can go 'pat pat' daily. Must try.