No there's no evidence you will reduce baby weight with Lipton. Yes, you can add Lipton to your tea. But you have to be very careful you don't abuse it. Lipton contains caffeine. Even though most caffeinated teas are considered safe to drink during pregnancy, as long as they do not cause a woman's total daily caffeine intake to exceed 300 mg. Women who are particularly sensitive to caffeine may benefit from aiming for a maximum of 100 mg of caffeine per day. I will strongly advise you to avoid too much of it