The amount of milk a toddler should drink per day depends on their age and nutritional needs. Generally, toddlers between the ages of 1 and 2 years old should consume 2-3 cups (16-24 ounces) of milk per day. Children over the age of 2 should consume no more than 2 cups (16 ounces) of milk per day. It is important to consult with a pediatrician for specific recommendations based on your child's age and health.