Oh, OK. The link that I posted was the original riccia weight invented by Birgit and Wolfgang. I think that was first released to the public about two to three years ago. They were planning to start a website and sell them. I think they even bought the domain name (www.ricciaweight.com) but never built the website. It is a great idea and ever since then people have been coming up with different versions. The latest version that I’ve seen is two layers of heavy duty wire mesh which the riccia is sandwiched between. It is a interesting concept but I think I’ll try the riccia weight first since it seems to work very well.