Elwyn was a healthy 13 month-old toddler when she started drinking water from the bathtub. Over time, she became increasingly thirsty and demanded more and more breast milk. For her parents, this seemed like typical behaviour related to a growth spurt. One day, however, they noticed that she was abnormally weak and rushed her to the emergency department. She was diagnosed with type 1 diabetes and had already developed a life-threatening complication of the disease known as diabetic ketoacidosis.