My breastfed 7 month old baby would not take any type of bottle or sippy cup. I went through 3 different cups and 3 different type bottles. My pediatrician recommended the Adiri Natural Nurser and she took it immediately. It has been a blessing. I absolutely recommend it. The only problem is that it leaks just a little bit but nothing too terrible. The newer models have that issue corrected though. A little pricey but totally worth the money.