K.P.
Just start taking it down a bottle or two each day, and then when a few days have gone by, start taking down a bottle more, and progressively wean her off of it.
It will get easier, more than 4 days, and sometimes more than 3 different kinds of sippys. It took my son to try around 5 sippys before we found one that he really liked. We use the Playtex ones that are colorful.
Start by taking away the car bottle or the nap time bottle, those will be easier to take away and replace with a sippy. Just keep handing it to her frequently through the day so that she gets used to holding it, and hopefully starts to drink from it more and more.
Then start by taking lastly the nighttime bottle, after she is more used to the sippy through out the day and then by then she might be more willing to use the sippy rather than a bottle.
It takes time, and a lot of patience. Just be consistent and she will learn to accept it.
Good luck!