Hey L.! So, I completely agree with getting off the bottle at 1. As a matter of fact, I had a party for my kids on the day of their 1st, and the very next day I got rid of all their bottles. Here's the thing though, the reason I believe in the 12 months rule is because of the easier transition for the child. You're right, she may refuse the sippy at first, but the thing is, she WILL drink when she's thirsty enough. the best thing to do, since you're a first time mom, and probably more sensitive to her getting upset and therefore more likely to give in to her, is to throw away all the bottles. If you want to, put them in a goodwill drop off box, but GET RID OF THEM so you don't even have the option of giving in. My daughter broke really easily. The first day with no bottles, she would say "dink" for drink, I would offer her the sippy and she'd push it away. So, I just kept offering it to her. I never switched cups, I just kept offering her the same cup. There's no reason to switch sippy cups, they all have one purpose....So, granted, I had to get the sippy for her frequently, but around lunchtime when she was eating, she did take the sippy and used it from there on out. With my son, he was a little more stubborn. He refused it all day long. BUT, a child is not going to let themselves get dehydrated. Eventually they WILL drink! If it's an issue, like you're offering it and your child is refusing it all day, start setting it on the counter or table for them when they ask for a drink, and then walking away. That way they can feel like you won't know they're taking a drink from it. Even at the age of 12 months, kids want to get their way, and if they want a bottle, and mommy's only getting them a sippy, to drink from the sippy is giving into mommy. So, try giving them privacy and then after about 10 minutes, go in and put it back in the fridge. With my son, he finally took a drink from the sippy the next morning, and he was fine after that. Now, let me tell you, if you DO give in to her, you WILL make things very difficult. Once you've taught her that you have a breaking point, she will get more and more mad until you give in and give her her way by giving her the bottle. So DON'T give in!