Dr. Brown's Options+ Anti-Colic 120ml Narrow Glass Bottle

We started off using tommee tippee advanced anti colic bottles when our daughter was born. After a tongue tie separation procedure at 2 weeks old, the lactation consultant advised us to switch to these narrow neck Dr browns bottles to help with the transition back to breastfeeding.We used these 120ml bottles right up to 19 weeks. As our daughter got older and her portion sizes got bigger, we noticed that she was spilling a lot milk from her mouth whilst feeding and also the bottles began leaking a lot too. Dr browns website explains that bottles can leak if baby is sucking too hard on the teat to get more milk faster. Switching to size 2 teats helped a little with bottle leaking, but she was still tiring herself out sucking and falling asleep without finishing a full feed. This meant that at 4 months she was still eating 10-12 small portions (80-100mls each) a day on average. This was incredibly frustrating for everyone because she was ultimately still on a newborn feeding schedule.When we felt it was time to switch to the larger size bottles I found them to be too cumbersome (the 250ml version of this bottle is really tall!). They didn't fit well into our tommee tippee steriliser and bottle warmer. So after some deliberation we decided to switch back to tommee tippee bottles instead of buying new gear to accommodate the larger Dr browns bottles.Amazingly, after switching back to tommee tippee anti colic bottles my daughter was suddenly able to eat bigger meals (150-170mls each) which meant she was now feeding only 6-7 times a day. She was also no longer spilling milk out of her mouth during feeds and able to finish a full feed before falling asleep.To summarize, I personally prefer the traditional shape of these dr browns bottles but I feel that the leaking is a serious drawback and it seems to be a very common problem with these bottles. And ultimately, it seems that my child was having a harder time drinking from these so I don't recommend them.