I was frankly blown away by how quickly and sincerely I got an answer about my stuck upper bottle parts. New ones were sent over without me even asking, and so far things have been working really well. I want to acknowledge great design changes—- different colored gaskets so you can tell which parts go with which set. Little gripper dots on the outer edge because keeping the bottle streamlined but also openable is difficult. Lovely engraved message that’s a reminder of what you’re striving for. I recommend the chiller to every pregnant person and pumping mom I know because it’s been essential to pumping at work, and because unlike many other companies- I can actually troubleshoot and get a real answer!! The bottle has held up fantastically. Seriously, A++++ to everyone involved.