Silicone this cup is very good !! I first bought a Mooncup experience but very rigid and experience of integration has been somewhat unpleasant, so, I decided to test the diva ... and "we-have a winner" Nothing to say comfortable and reliable !!! I do not use it: saving time (no going to change every two hours), money (from the 2nd profitable use), health (exit toxic buffers) and gain "green" certainly (over non-recyclable exchange rates).