Milkshake even though I'm lactose intolerant. But tea has caffeine in it, so I rather drink a milkshake than to drink ice tea. Caffeine makes me jittery, gives me a headache, and makes my heart beat fast. Like I was running. So I rather have a upset stomach, than to have all those other symptoms from caffeine. Besides, if I drink a milkshake during the day. It doesn't bother me. Because it's not sitting in my stomach all night. It will digest by the time it bothers me. So milkshake it is.