I attached a simple latex party balloon to a Foley catheter, so that my bladder had to push against the resistance of the balloon. First you'll see me put on my gloves and insert my catheter. I set a timer, so that it was easy to keep track of how long my piss was filling the balloon. Then, I started pumping my clit, because why inflate just one thing, right? My clit wound up huge this time, and I put a tiny cock ring on it while pumping, which changed the shape in ways I found interesting. As the balloon filled with pee, every so often I squeezed it all back into my bladder, so that I was suddenly desperate. It was such a relief to push it out into the balloon again! All this made me so horny, and it felt inconvenient that I couldn't finger my peehole right that minute like I wanted to, but I settled for using the hitachi on my swollen clit. After over an hour of playing this way (and making sure I was staying extremely well hydrated) I could only barely squeeze the balloon's contents back into my bladder, so I figured I had found my bladder capacity, or nearly so. It was weirdly hot to me to play with that balloon, knowing it was almost exactly the size of my full bladder, and feeling the warmth of my piss inside it- sort of like getting to take my bladder out of my body and play with it! When I took the catheter out, I tied off the balloon, and took it with me into the shower. It wasn't taut enough that I thought it would burst if I dropped it, so I put a needle in my mons, sticking up so that I could drop the balloon onto the point. It didn't turn out quite like I expected, though... the moment I drop it isn't visible because of an unfortunate camera jostle, but you'll hear me laughing at what happened before you see the results for yourself. The video wraps up with even more pissing, because I simply don't believe there can be too much of a good thing.