Bad manufacturing

I bought my son the anti colic bottles when he was 2 months old. Now that his 6 months those bottles are problematic. They leak excessively when i ***** on the cap. The numbers are also fafing. This brand us expensive. To buy bottles every time because of the name that keeps fading is a ******* and ridiculous. I have sent emails and contacted them via facebook. Yet i recived no response. This shows was poor workmanship is.