I had one of these teas today and as I was finishing it I realised I may have just eaten a stack of gelatin, it freaked me out so i went on the net to find out the ingredients. Like most of the frustrated consumers here I too found nothing! Happily though I found this website

One thing I did find on wikipedia relating to bubble tea was a disturbing comment - "Concerns have arisen regarding harmful chemicals that may be used to make popular bubble tea drinks. Boba pearls, milk powder, and juice syrups may contain banned chemical additives in order to reduce costs. Recent information from Taiwan has shown possible use of DEHP (a chemical plasticizer and potential carcinogen used to make plastic) as a stabilizer in drinks and juice syrups. Some of these products may have been exported and used in bubble tea shops in the U.S. and around the world. DEHP can affect hormone balances.[9][10]
In June 2011, the Health Minister of Malaysia, Liow Tiong Lai, instructed companies selling "Strawberry Syrup," a material used in some bubble teas, to stop selling them after chemical tests showed they were tainted with a carcinogen identified as DEHP.[11]"
So yeah... until i can get a definitive ingredient listing from them i will put this on my ban list.