1 If you like iced tea and you are a stone former, drinking a moderate amount is unlikely to cause you to develop more stones. 2  Based on the available research, it may actually decrease your risk of stones.) If you drink tea with milk, the calcium in the milk binds the oxalate, further reducing the amount of oxalate absorbed. *As discussed previously, this may be different in the approximate 20% of stone formers who have high urinary oxalate as a risk factor; they may be “super-absorbers”.