My 14 months old daughter didnt use bottle since she was about 1 year old. I also didnt use any special method to help her 戒奶樽 because she never like to drink milk since she born.
However, she drinks a lot MORE milk when she started to use 飲管杯. I think she hate to suck on the 奶樽, I tried that myself, its hard for me to suck on it too but its much more easy to use 飲管杯. and she just use about 5 mins to finish 8oz milk now.