I’ve been using one of these carpet sweepers so long I forgot to think of it as a Cool Tool. You’ve probably seen them used in restaurants and hotels. They just plain work. No electric, no plugs, no noise & lightweight. So convenient to grab for a few second cleanup. Just push and they clean, even small crumbs. They go forever. Around $50. And when you flip them over to empty, you’re always amazed how much stuff they picked up.
A cool tool is anything useful that is superior to comparable items. If you think this tool is inferior suggest a better one. You are welcome to insult a tool, but comments containing insults to individual people will be deleted. Corrections of fact are always welcomed, if stated politely. Recommendations of better tools are dearly wanted and may be elevated to the front page.