This technically doesn't fall into any of my "categories" such as art, decorating or food. But nonetheless this list of useless inventions is too funny. Just goes to show you why some designs become classics, and others are lost to the archives of websites like Designboom.
Here are some of my favorites...
The Catpaw Duster (I'm thinking about trying this one out!)
An eye protector for chickens! Are their eyes really so vulnerable? Who knew?
A food cooler...are we really getting that lazy that we can't just do it the old-fashioned way?
This was listed as "fire escape". Hm...
[Via Designboom's list of useless inventions]