My breeder said don't use a bottle because the birds do like to dunk in the bowl. However, the water was getting poopy and so soiled several times a day. I bought a bottle, and had both in the cage for about 3 weeks.
I would put the bottle above the water bowl. I took my finger and, from behind the cage, tapped the ball in the drinking tube, so he could see the water drip. He would try it after a while, but I waited a long time before removing the bowl. I had to make absolutely sure that he was drinking from the bottle.
First I only removed the bowl at night, and put it back in the day. Once I was sure, I removed the bowl, and he drinks from the bottle, and his water is clean.
