I also can not drink regular milk (or soy milk for some reason). My stomach is very sensitive to different products out there. I used to drink at least 3 glasses of milk a day as a kid and loved it, but one day I started getting terrible stomach aches from it and bloating. Definitely give lactose free milk a try with your tea if you are having this problem. I buy Lactaid and don't notice a big difference in taste. It tastes fresher to me and it has more calcium. I also buy the fat free one and it even lasts longer than regular milk.