Ten Perfectly Pure Gadgets

Over at BB Gadgets, John posted their list of "perfectly pure gadget," which he describes as gizmos that don't need any additional technological advancement. From the entry on the mousetrap:
 Images  Mouse-Trap What the guillotine is to the French, the mouse trap is to unhygienic Americans. A spring-loaded mousetrap is (usually) a clean way to kill a mouse. But spring for a non-lethal trap out of the kindness of your heart and when you release that mouse, you'll see it poking out of your Cheerios the next morning. Try a glue trap, and you'll hate yourself for years as you torture a cute, fuzzy animal to death. And poison is a painful crapshoot.

Oh, sure. It's a cruel gizmo. But it is perfectly designed: "build the better mousetrap" has become an ironic cultural shorthand for "waste of time."
Ten Perfectly Pure Gadgets (BB Gadgets)