i don't think so, dg. what i feel about the mooncup versus the tampon is that the mooncup is catching the blood, full stop, nothing else. a tampon, otoh, is absorbing anything and eveyrhting it can gets its mitts on, it doesn't care. i'm not sure about urine, per se, but i have found much less cramping which i personally attribute to the fact that it doesn't, er, dessicate the entire area.