Playtex bottles with the disposable liners have been a staple for me throughout all three of my children, two seperate decades and they are a staple because they work! I started out all three babies on fancy bottles and within the first month or so, I always seemed to gravitate back towards these for multiple reasons. First, they are super convienient, you throw the liners away and there is nothing to really wash other than the nipples. Also, I know I am not the only parent who has left a bottle in the crib or the car for hours or overnight and then gone outside or to lay the baby down, and oops, there is a bottle...now with gross, reeking formula...with these, it is way easier than trying to scrub that mess out of there and gagging in the process. The other reason that I am so obsessed with these bottles is because they truly are the best when you are trying to avoid your child sucking in all that extra air and getting a bellyache...an unhappy infant with a tummy ache can make for miserable baby and mommy. These, you squeeze the air out and you KNOW right away that your baby is drinking formula, not sucking all that air in. I would and have recommended these bottles to everyone. I love them. They are great quality, from a brand that I trust that has been around forever.