How to Easily Create a Centre Pull Ball of Yarn

Hello everyone. :)
When I'm about to start a knitting project, I always make sure that I can pull the yarn out of the centre of the skein. If this is not possible, either because the yarn is in a big jumbled mess, is in hanks, or I just can't find the centre, then I find any end I can and make a centre pull ball of yarn.
I think it's useful to have a centre pull ball because then the ball stays put when you're using it, instead of bouncing around. It also helps prevent tangles.
My mom taught me this easy method that only requires one supply other than the yarn. and I think it's the easiest method that I have seen.

Step 1: Supplies

Supplies Needed:
- The yarn you want to wind
- A small bottle with a lid

I like to use these small medicine bottles. A bottle long and thin is ideal. I've also used hotel soap bottles.