I'm not coordinated to do that with any type of bottle. I do know for a fact that they make a noise, but not a "squeak" noise. I bought two large Hydros for work (I'm a teacher). I use them during class while my kids are working independently or in groups. Unscrewing the cap does make a low "clanking" noise, but it is not excessive. If you are worried about it being disruptive during class, don't be. It really isn't that noticeable. I just spit my water out at this. You owe me a new monitor.