Which Menstrual Cup do you use?

I'm looking into buying a menstrual cup... I have gathered enough info to know that they are NOT one size fits all, and that you have to find one that works for you. If anyone on here uses them, can you please share which one you use and why? I don't wanna waste a bunch of money testing all different kinds... I have a small vaginal canal and my gyno said even the smallest speculum was a tight fit so I'm nervous... However I've used super Tampons with no problem. I'm confused and there are so many I feel lost lol. Please and thank you!!