I've lurked around this community and related resources off and on trying to find a definitive resource/answer to my question, so I'm sorry if this is a repeat, but I've been having trouble finding anything yet. I've been a cup user for several years now, with a Meluna as the first one I've tried (either small or medium, I forget which) which I've liked a lot, except for one problem: no matter how much I practice, try different folds, or run it under cold water, I overwhelmingly have problems getting it to reliably open up inside me. Even when the brim opens up, quite often the body remains caved in, so I'm not getting much volume at all. I can reach my cervix, though with some difficulty, so I assume I'm about an average depth; since this has been happening from the very beginning for years, I'm pretty sure it's neither the material softening with age, nor just pure inexperience.
I'm thinking it's about time to buy something new, and look for a cup that's considerably stiffer in both rim and body, since I'm not having trouble inserting it. Stiffness seems to be the single most difficult to find aspect of a cup in a review though, not to mention super subjective, and the one or two rating lists I found seem to be limited in the brands on there. What brands can you all recommend to me that spring open easily?