The main purpose of this legislation is to update the types of milk that schools can offer under the National School Lunch Program. The goal is to provide students with more options, including flavored and lactose-free milk, to better meet their dietary needs and preferences. Key provisions of the legislation include the requirement for schools to offer both flavored and unflavored milk as part of the lunch program. Additionally, schools are allowed to provide lactose-free milk, which is important for students who are lactose intolerant.