Is it some kind of medieval torture device.. or perhaps the latest and greatest NYPD road spike strip? Oooh, how about a blow dart machine gun?
Umm, No. It's actually a very cleverly conceived bottle washer that hooks up to a submersible pump and sits over the sink or wash basin.
Here are a few details as described by MalFet along with a video and link to the parts list and full article. Any questions about it can be asked via the "Original Link" at the end of the post.
"It's a very simple concept, but it can wash, rinse, and sanitize 30 bottles with virtually no effort. I built a frame out of 1/2" cpvc fit to a standard rectangular milk crate, used 1/4" copper refrigerator coil for the vertical bottle spouts, and push water through it with a 1/4 HP submersible pump. The pump sits in my sink filled with whatever I want to wash with (pbw->rinse water->star san), and the milk crate rests right on top of it.
I made three of them since I always bottle two ~4.5 gallon batches at a time, and washing those 90 bottles is now trivial. I fill the sink with PBW, let it run on each crate for 5-10 minutes, drain the sink, fill the sink with star-san, and then run it again for a minute or two. My active time for 90 bottles is probably somewhere in the neighborhood of 5 minutes. It's so painfully easy that I kind of hate myself for only doing this now after all these years.
I get plenty of power from this pump, and without the bottles to block it the stream of water coming out extends 3-4 feet above the spouts. I ran through a batch of very grimy, dried out bottles and they came out completely clean after 15min of PBW. If I built it again, I might actually use copper for the frame and sweat it all together. The JB Weld holds reasonably well, but in knocking the washer around a bit a few have come loose. They still work perfectly fine even when loose, but welded metal would obviously be more durable over the long run."