Genius way to clean a glass bottle from, the inside with a magnet and steel wool

I love this life hack for cleaning a glass bottle from the inside.

Simply squeeze and drop a piece of steel wool through the opening, and then use a magnet on the outside of the bottle to rub the steel wool around the inside of the bottle.

Why is this video so much fun to watch? I want to go buy a glass bottle like this and then get it dirty just so I can try this fun trick.