Not a Diva cup but a mooncup. It is large enough to safely hold a heavy days flow - I've gone 8 hours without emptying and no overflows. And no, you don't feel it at all, they do take a bit of practice to learn how to get it in right and once you've mastered getting it out, you snip off the stick part and you don't even know it's in there. Sooo much better than a tampon as you still have your natural lubrication (so you might think you're overflowing, but it's just your natural cm) and you don't have the dried out feeling that a tampon gives.