These were the bottles I used for my son. very easy to hold for both myself and my son as he got older. No problems with air bubbles or excess air intake by baby. Easy to take apart and clean

I have been using these bottles since everyone told me they we're the best and I have to admit I wasn't disappointed. However I did find that the new models with the blue bottoms don't always work good and my daughter had a hard time drinking from them so I had to buy more transparent ones and switch them.

I didnt have a problem with these bottles. I used them when my son was newborn until about 6 months then we switched to a 10 oz Nuby brand bottle. I liked the angle of the bottle and found it easier to hold.