Ways you can use a cork for your small bootle

I wanted to put a cap on my bootle with sulphur shavings i added in the bottle and intend to use later on.

Than i thought that maybe i can cut a cork, which has a round shape.

Rectangular shape dosen't made sense if the corners are cut in a diagonal fashion, as dust will go in.

If you cut them imperfectly, it will work because the cork has some flexibility.

Another way for a different cork :

I carefully pushed on the bootle neck and a circle shape was made and after that i further enlarge it with my cutter.

Regardless of how you cut it, just watch your fingers.