Yea, along the same lines. I didn’t know that nipples came in different sizes! We tried to give our newborn a bottle with a high flow nipple and wondered why he couldn’t handle it! We realized later that we were gifted several different size nipples.
On the same topic. Once he started refusing the bottle over breast, we downgraded the nipple size to preemie so he had to work for it from the bottle just like on the breast. Worked like a charm!
I’ve been a nanny for 17 years, and until 2 years ago I never knew that onesies had those weird shoulders so that if baby has a blowout, you can pull the onesie off and down instead of pulling the poopie clothes over baby’s head. DEFINITELY wish I would have known that sooner!!