My youngest, also adopted, had a bottle until almost age 2. She was small for her age, had some eczema, and we were using a lactose free formula that worked well for her. I really agree it is not anyone's business except your own on what you decide to do. There is a lot of anti-bottle sentiment out there and a lot of stories concerning tooth decay, etc. My dd is now almost 10 and her teeth are just fine. Do what you feel comfortable with and enjoy your baby.