I was given a gift-pack of these at a baby shower back 2006 for my daughter. I loved them. I loved the convenience. I told everyone about it. Fast forward to 2017 (11 years later!), you can only imagine how happy I was to see this line still available. It's the only bottles I planned to use. My husband and I are always traveling places and these bottles make it amazingly convenient. We bring two bottles, liners, and a handful of nipples. That gets us through the day to wash everything at night (except the liners, those are recycled). The only downside to this system is that my son struggled to hold the bottle on his own. The bottles themselves are a bit bigger than traditional ones so his grip was a bit of a problem.
VA - Virginia