curiousSo the cup was fine the first day I tried it (a few days into my period) so the second day I went without backup protection, being quite pleased with it's performance so far. But I got a nasty surprise only four hours later when it overflowed (at my boyfriend's parent's house no less)! I thanked my lucky stars the chair was unscathed...
Now what's puzzling me is this. A mini Tampax tampon (absorbency 6-9g) is just right for me overnight on my heaviest flows (in for 8 hours or more, too). The cup holds about 13-15ml when full. I don't know what the tampon absorbency is in millilitres, but I thought the cup claimed to need emptying much less often than a tampon or pad needs changed because it could hold more. I would also never have to change a pad in only four hours (unless I don't change them often enough?). Or maybe I bled more because of the cup? I don't know.
Has anyone else had a similar capacity issue that doesn't tie in with expected values?
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One other brief question - when it pops open and the seal forms, it's not a very pleasant feeling - almost a little sore, from suction on the womb I think. I'm nervous of this, having a coil in (IUD). Does anyone else find the seal forming unpleasant?