Honda Jazz - Strappy Thing

So, I have a new (my first) car, and it has a rather lot of boot space which is awesome, except usually I have next to nothing in it.

I wanted a way to keep one or two odds and ends secured in there in such a way it wouldn't just fly around as I drive.

I noticed that there's otherwise useless space behind the wheels and a conveniently located hook for securing a baby seat.

Initially I wanted a basket (and after I build a 3D scanner, I might still make one) but failed at measuring, So I