I own the red one in t-shirt form, because I am gigantic loser.
This particular part has a lot of flexion in it. It's basically .035" thick donuts welded to one another the work like a shock absorber. It is then put inside of a case and attached to a water system. It absorbs the water hammer from the system without banging the pipes up against the wall.That's some nice welding but being a Machinist I don't see why you would weld it when it would be easier and cheaper to turn it from solid.
Milk will help clear your mucus membranes but it won't stop the burning.