My little one is getting to the age that they want to hold the bottle on their own. We already had a set of handle bars that fit on our Mam brand bottles, but the fit is too tight to allow the handle bars to rotate while the lid is on. So I decided to make these handle bars in fusion 360. The center circle is small enough to keep the handles on the bottle with the lid screwed on, but still enough space so they can rotate around the bottle itself.