I think I'm in love. I just got a few more cups in the mail today, and thought I'd post pictures and a quick description of the Eco-cups (size 1 and 2), Mamicup and Ruby cup (the others have been written about).
The Eco-cups, even the size 2, are almost as short over-all as the Si-bell/Natu (that's a Natu in the pics, but it really looks the same), but the cups themselves are so short that low cervix people can wear them easily.
-About one pt firmer than small Fleucup
-4 small holes that sit very low
-very smooth - I can see the sidseam when held against light
-4 small holes
-shape and size very close to S Fleurcup
-inside feels different from peachskin outside
-outside has many grippy textures that may be an issue if you are sensitive
-a tiny bit softer than S Fleurcup
Let me know if you have any questions.