V.S.
Hey K....
My daughter Katelyn refused her bottle at 9months so we went to a sippy cup, shes now 2 (as of last week) and has been on straw cups since about 15months (we give her regular open cups but water only since shes still a bit clumsy lol) but my little cousin is 2yrs old and still on a bottle... I think when they're ready they drop it on their own... but you're helping the decision by the steps that you're taking which is good... just keep offering it leave it around (not long enough for it to spoil but you know what i mean) she ust might surprise you and walk up with the sippy ... =o)