I’m not usually a big fan of single-use tools, but this is by far the only tool for this job. We had a party where I needed to core and slice three cases of pineapples, and what could have taken all day took but a few hours. No skill is needed. You just cut off the top of the pineapple and screw down the corer. Once you are at the bottom, pull out the meat and you’re done. The pineapple is evenly-sliced and you are left with a usable hull (for serving fruity drinks in, of course). I have seen these on sale for as little as $7.
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.