I just discovered this a few minutes ago. Quite literally.
I recently started using toilet paper instead of tissues. I have a regular toilet paper holder something like this
https://a.co/d/hTKz9WjWhat I find very annoying is when I tear off a strip the toilet paper keeps unrolling, making a mess.
My mind starts spinning thinking of how to design a nonelectric automatic toilet paper dispensing and cutting device with springs and whatnot (they have it for paper towels).
I just went into the bathroom now and saw the answer is simply an oval. 🤯 No engineering required.
I'll let you figure it out
I got a lot of hana'a from the simple solution.