My aunt used them for my cousin and she barely spit up, also it was super easy to burb her.
ok great. thanks ladies @sirenita_x3 @shevy those were the ones I put on my baby registry.
I've heard there really good at keeping the baby from drinking extra air, and are great for colic babies! Those are the only kind of bottles Marissa got for her baby shower.
thanks @tibi2696