I was on my way to hospital a few days ago and parked my car in a parking lot. I went and got changed from my working clothes to my civies and on the way back decided I was needing a pee. As I was closer to my car than to a bathroom and desperate, I decided to use my pee bottle I have in my car for emergencies, as I have a bit of a bladder problem. So I got the bottle out of the rear of the car and got into the drivers seat. I lowered my zip and put my penis in the neck of the bottle and started peeing. Unfortunately due to the angle of my seats I had a bit of backflow onto my trousers but luckily I had a spare pair also in my car in case of a wetting accident. So I looked around and removed my trousers and slipped on the other pair before anyone noticed, then got out and poured the pee down a drain in the parking lot and carried on to my hospital appointment.