Milk - transitioning from bottle

C

Our daughter still takes two bottles of milk, one when she wakes and one after her first nap. Our doctor told us to transition from a bottle by 18 months but we only started trying around 17 months trying with the straw cup she uses for water. She isn’t having it. Thinking of trying the 360 cup but wondering if anyone who has dealt with this successfully has any advice. Thank you!