At 7 and a half months I threw away all her bottles and replaced them with sippy cups. Only time I allow my daughter to have juice is on special occasions or if she's constipated. Other than that she takes a sip or too from mine and her dad's glass once in a great while.
My 10 month old refuses every sippy cup we have tried. We have tried about every sippy cup 😂 but she LOVES her contigo gizmo, thermos funtainer and tommee tippee straw cups. She has been using them since 6 months old. The contigo gizmo is her absolute favorite.