What are some under appreciated inventions of the 1900’s?

I can’t get enough Florida water. Not only do the ladies love the scent when I wear it out to the bars, it also feels good when I put it in an ice bath and lather that shite all over my body on a hot summer day. It gives my balls a nice tingly sensation.

And it costs less than $5. So even the non-ot ballers can afford it. It’s a win, win, win.