The idea is wonderful and as of now it is working like it should! But...it was a real hassle it get placed on the skin, the "male" rim no problem to get into the hole, the smaller "female" ring was a whole other story, it was/is just too small to get it placed onto the other ring! Bit of a bummer, had to get a hammer to get it to work at all, still not sure how long it's gonna last!!!