These bottles are perfect in shape, neither too small nor too big. They are affordable in my opinion compared to other bottles that claim to do the same thing these do and they don't. Our baby likes them.

These bottles let her control the pace and she has no leakage! Prevents me from having to get up mid nap to refill bottle or make two at once. And my baby doesn't choke on her formula when drinking, she controls the flow.

Baby is primarily breastfed (3 months now) also the bottles are lightweight so baby is comfortable with the bottle in his hands. Plastic is better for baby holding due to weight although she can hold both. The * is very durable.

These bottles are great because they have a wider opening making it easier to pour from the pump or formula mix into the bottle. The wide opening makes adding formula with one hand much easier and less wasteful. These are easy for my son to hold and f...  Read More

The * have an air vent which must be aligned to a notch in the bottle ring. However, the air vent in the * typically makes a very audible hiss as it vents air. Have to open the lid every so often or manually squeeze the * to release the air.