This is kind of funny. As a kid, I had a book called “Inventions No One Mentions”. It was a great book that included 80 or so inventions that failed. The included a Ferris wheel that worked by river current and a doggie car seat for the window (that one was even pictured on the front cover).
If I remember correctly, one of the inventions in there there was a cookie cup, just like this one.
