An eight-year-old boy was sent to hospital. Doctors found a serious problem with his kidneys. What shocked people was his habit. He drank milk tea or sweet drinks almost every day, instead of water. This story spread fast on the internet, and many parents felt worried. Doctors explain that a sweet drink now and then is fine. The body can deal with it. The trouble starts when sugar becomes a daily thing, especially when a person is still growing. Here is a simple rule for the schoolbag: bring a water bottle, and let sweet drinks be a treat.