A pre schooler should drink ____________ ounces of milk each day

That depends on the child's age.

http://healthyeating.sfgate.com/many-glasses-milk-should-kid-drink-1100.html

1cup or8fluid ounce

To determine how many ounces of milk a preschooler should drink each day, it is recommended to refer to guidelines established by reputable sources such as the American Academy of Pediatrics (AAP) or the World Health Organization (WHO). These organizations generally provide recommendations based on the age and nutritional needs of children.

For preschoolers, the AAP recommends that children aged 1 to 3 years should consume about 2 to 3 cups (16 to 24 ounces) of milk or dairy products per day. The WHO suggests a similar range of 300 to 500 mL (approximately 10 to 17 ounces) of milk per day for children aged 2 to 5 years. It is important to note that these recommendations may vary slightly depending on the child's individual dietary needs and any underlying health conditions they may have.

It's always a good idea to consult with a pediatrician or registered dietitian who can provide personalized advice based on your child's age, weight, and overall health.