I was thinking of purchasing the shewee (the "moulded plastic funnel that provides women with a simple, private and hygenic method of urinating without removing clothes whilst standing AND sitting" for camping. My question is if I use it, would my cup leak? I know tampons sometimes leak when I go to the bathroom. I don't want to use it and soil my clothes! I'm purchasing a lunette, if that matters. I looked on the instead website (which I'm planning to use for cup back up and it says "You may notice some leakage when going to the bathroom. This is because when you void urine or your bowel the muscles "bear down" and can push the rim slightly forward, allowing some fluid to leak out and into the toilet." Well, I dont have that option! If have used instead, did you experience this? The company said it was rare, but if it was rare they might not have it on their site!