Done that before, only I used an empty jug I had in my pickup.

I was on I-25 betwixt Denver and Colorado Springs one night about 5 years ago, heading home from work. Was winter and the roads were particularly icy. My normal hour-long commute turned into a 5-hour crawl. I started feeling the pressure fairly early-on. Trouble was, I couldn't pull over and say "to heck with decency...I'm just going." The shoulders of the highway were covered with snow and ice and I was driving my 2WD pickup (I'd be able to pull over, but I wouldn't be able to get moving again). I had to time it just right, because although traffic was crawling, it was still unpredictably moving in small spurts (NPI <img src="/forums/images/graemlins/lol.gif" alt="" />). Anyway, I managed to take care of business and not make a mess (how, I don't know).

By the time I was done, I think that was one of the the most relieving...er...events I'd experienced.

Oh...and I didn't rinse out the jug for re-use. It was promptly disposed once I got home. <img src="/forums/images/graemlins/lol.gif" alt="" />