The bottle unscrew itself when I was pumping and dropped to floor and I wasted 4 oz of milk! All on floor! Smell so good but on the floor!!! I am soooo angry and upset!!!! ! I have already kept screwing it back but I don\'t know why it keep unscrewing !!! It\'s such a bad design even though it pumps well!!!
I hate Avent too! Its design is bad! The loosely bottle will make you very nervous when pumping milk as you afraid the bottle may fall down any time. Moreover, there are too many parts and pieces, that complicates the cleaning and sterilizing process. It takes 20 min to pump but and more than triple times to unplug, wash, sterilize, re-assemble the setting! Horrible!