It's interesting that there are quite a few posts here by people who are, like me, lactose intolerant.
I can cope with one normal coffe a day if I have to, but that is my limit. I just buy Lactose free milk by the carton. Locally it only comes as a Long-Life carton, so I can buy a few and they don't have to go in the fridge until needed. Also cheaper than fresh(normal) milk anyway.
All they do is break the Lactose molecule in two, giving Glucose and Galactose. Also makes it taste slightly sweeter.
Flavours? Too much mucking around, just down the hatch!
Karen.