I received this product through weespring parent panel in exchange for my honest review. I can honestly tell you these are great bottles. What I like best about the bottles is how easy they are to clean. Some anti-colic bottles require different cleaning utensils for each piece but these you can wash all with the same brush. The wide neck allows you to easily clean the bottom of the bottle too. Once clean they are very easy to put back together. They don't require one specific spot to put the anti-colic valve or multiple pieces to construct together before putting on the nipple and cap. One con for me is that you have to be aware of where the valve is located. Usually during night feeds I keep the lights off, but with this bottle I have to turn the light on in the beginning to make sure the valve is on top. I also have to be more aware of how my little one holds the bottle. He is almost one so wants to help with his feeding now. Generally he just grabs the bottle and gives it to himself. With these bottles I just have to take a few extra seconds positioning the bottle after he grabs it. Both instances minimally affect our feeding and I would still reccomend these bottles for someone whose child experiences colic or acid reflux. Overall I really enjoy using these bottles. The shape is perfect for my little ones hands to hold and it's also easy for me to hold from different angles. It's easy to clean which is a huge plus. The only down for me is that the valve has to stay in the top position to be effective.