Bottles leaked!

My baby started using bottles as early as 2 months as I have notoriously low milk supply. He's a bit colicky so I've decided to try Playtex vent aire on him. The first few months were really good. It seems the bottles are doing what they were supposed to do. However, about 3 mos after and the bottles started leaking from the bottom. My suspicion is that the plastic disk at the bottom started loosening up due to repeated sterilizing. If you have to keep replacing parts, then it can get pricey compared to other baby bottles in the market.

I don't recommend these

Too many parts to clean and if that seal gets even a little bit old or out of place you have formula EVERYWHERE. I prefer the drop ins from playtex now.