I'm a three year convert to reusable menstural products - having been thrushy and miserable most of my life with standard products.
The main difference between these two is divas are made with latex and mooncups are not...an important difference if you are latex sensitive!
They hold around 50 ml of menstural blood and once you have the knack you have much less mess, odour and general unpleasantness, compared to tampons etc.
Yes, they take some learning to use (and the first time you ping one just as you are inserting it, your eyes will water), but they also stay in place really well doing sports, I have swum and run 10k with one in without problems.
I'm not totally convinced on this, but some women say that it reduces cramping - in theory I can see how, because it holds the vagina reasonably open, but you would have to try for yourself.
I've had much discussion on the cleaning/sterilising at the end and usually boil mine (just don't forget it and boil it dry!), but I know that sterilising tablets work well when travelling, and several women I know use the dishwasher.
On the point of travelling - if you are not wearing it through customs be prepared with a leaflet explaining its use - trust me, the mime is hard to do with a straight face!
Both products are available in the US, I was wondering about that. The moon cup reminds me of a cervical cap made from rubber used for contraception. I like the little stem, which would make it much easier to insert and retrieve I do really like the idea.
Just at the end of this month's cycle and about to boil my moon-cup tomorrow. It really is no worse than emptying the bin of pads and such bits, and IMHO smells better because the blood hasn't gone stale.
I will admit that sometimes the amount of blood is a bit like "oh dear, I'm not sure I wanted to know how much I am losing", but you do get used to it.
Cycle diet hasn't altered my losses (didn't expect it to), but it meant that my period was almost but not quite a surprise, because I was only a mildly moody cow instead of a psycho...
So even with an interuption mid cycle for Christmas, it does have benefits!