There are lots of menstrual cup brands – this site only lists a few of those that are available. Some of the better known brands are Diva Cup, Lunette, Moon Cup, and (in Australia) Juju. There are a few good review websites – for example here – that have information and reviews on a much bigger range of cups.
You might find that the cup that is right for you depends on your own shape.
More recently, a menstrual cup brand getting a lot of attention has been the Lily Cup Compact.
The innovative part of the LilyCup Compact is that it is collapsible. It’s the first collapsible menstrual cup – meaning it folds down almost flat, so you can carry it around in a small disc-like container. The (hot pink) container is smaller than the pouch you’d generally use with other cups, although those are still smaller than a box of tampons and certainly much smaller than disposable pads.
The container provided to hold the LilyCup Compact is so small and flat that you can carry it with you everywhere. It would fit into a small purse. Why would you do that? I guess the main reason is so you never suffer from a surprise period. You have to think even less about being prepared.
A few weeks ago I was at a cinema and I heard the teenage girl in the next cubicle shout out to her mother than her period had arrived, and she didn’t have any tampons (oh no!). The mother didn’t have any ‘supplies’ either. I listened as they discussed how they would have to go to the shops and miss the movie. Great. Not being someone that admits to eavesdropping (especially not in a toilet), I didn't say that one of the advantages of menstrual cups is you don’t have to go buying new disposable products every month or so. The collapsible version is even more convenient, potentially, as it requires even less space, in your bag and in your brain. It would also be particularly useful for travelling.
When not collapsed the cup (though made of very soft silicone) is as firm as a normal cup. When pushed firmly from above, it collapses in a couple of little pops like those kitchen and camping items that are so satisfying to play with (or is that just me?). It would take a completely implausible amount of effort or bad luck to collapse it in other circumstances (i.e. by accident when you’re wearing it). But I guess you should always be careful with inserting a cup, and be wary of things that can (as with disposable products) go horribly wrong.
Intima also make the Lily Cup. Lily Cup and Lily Cup Compact aren’t yet listed with TGA Australia and there don’t seem to be places to buy within Australia.
As I was curious about this new type of cup I ordered a Lily Cup from overseas (Intima is based in Sweden), and it arrived in Australia within a week. I haven’t used it yet but I just checked out the folding mechanism and have popped it into a very tiny zipped section of my backpack for my trip away to the beach this week.
The pictures show the cup and the case, and the process of folding the cup down flat.
See more about Intima's menstrual cups, including the A & B sizes of the LilyCup Compact, here.