system
Given the following post, respond as if you're commenting on Reddit:
human
What's the optimal volume of fluid in a cylindrical container to maximize turgidity from shaking the container?

So, I'm cleaning a lot of baby bottles lately.

Usually, we'll use a bottle 2-3 times before it goes through the washing machine.

In between uses, we fill the bottle with scalding hot water and shake it vigorously to give it a "quick cleaning".  What I haven't figured out yet is, how much water is optimal to put into the bottle to create the max cleaning effect through shaking?

If I put in too much water, it doesn't shake around much.  If I put on too little water, it sloshes around without scrubbing the inner surface.

**EDIT:**  Answering a few common questions:

- The bottle is cylindrical, but with rounded corners (and some irregularities at the nipple end).
- Experientially, I've found 1/3 to be a good volume for cleaning.
- Clean, for me, is when I can no longer smell the previous contents of the container.
- Cleaning fluid is just tap water at it's hottest setting (enough to hurt skin, not hot enough for tea).
gpt
The maximum volume of fluid which allows for full range of motion- i.e. all fluid moves during a slosh to a place which did not have fluid before the slosh- is 50%. That would seem like a decent starting point for empiric investigation.