Menstrual Cups - Divacup, Mooncup, Instead, Lunette, Miacup

So I was just wondering if any of you have purchased cups from ebay and if so what the results were?   Any horror stories?  Any really good ones?  Can we trust the silicone from China?

Thanks!
Sheila

Anyone have any fixes for "leakage" that seems to be just the blood that gets trapped between the vaginal wall and the cup (I'm guessing it's the same as the blood that ends up on the tampon applicator after you remove it)? I don't think the cup itself (Mooncup, if it matters) is leaking or overflowing, but I'm still having to wear a pad as backup lest I stain my underwear, and I really hate pads.