In my opinion 26 months is too old. I switched my daughter to a sippy cup when she was 13 mos. We were ditching the binky at 26 months. It took her about a week to get entirely used to the sippy cups...back then they didn't have the nuby ones with the soft "nipples" If you don't want to completely wean her until she's ready, then make a rule...only bottles at night time, use sippy cups at nap times. My concern to you is her teeth...if she gets a bottle at bedtime and naptime, (I am assuming she gets milk) the milk is going to sit in her mouth and rot her teeth. If she will take it, give her water to go to sleep with. I never gave my daughter a milk bottle to fall asleep to after she was about 9 months old. I started putting her down with water.
Whenever you decide to get rid of the bottle, the easiest way is to have them disappear one at a time until one day the only one left is the one in her mouth. Once you get rid of the last bottle, if it's not there she's going to know she cannot have it. That is how we FINALLY succeeded at 3 1/2 years with the binky disappearing...but also know if she finds one...it is going to go into her mouth...no matter where it's been and what is in it so you need to make sure you get them all...
Good Luck, it is a long but worthwile road!