We have a couple of internal doors that are continually being slammed by the wind at our place. After being inspired by a few 'door stops' I saw in shops while on our trip away, I had a little go at making my own.
Here is my first design trial... a triangle shape filled with rice (sand would probably be better). It sort of reminds me of a deformed pear.
So far so good... no slammed doors, but lots of 'door stop' cuddling going on.