I smoke several bowls a day, but when I’m out and about I take two with me at most and have run into the issue of a wet and unpleasant pipe unable to dry before I wanted another smoke. This idea came to me one such day and has worked well. Gravity has held all the pipes I have tried this in in this position, although upside down does works better. Using the vent system on my truck has reliably dried my pipe fairly quickly. I wouldn’t suggest using this method for a heavy pipe, as the vent supports the weight. Also I wouldn’t advise using with the air conditioner as AC can sometimes be a bit moist in my experience. Also remove all dottle as it is likely to dry and fall onto the flooring if your vehicle. As I drive a truck with rubberized flooring I haven’t had a need for concern, however you may if you have nice carpets or upholstery . Just a silly fix for those of us impatient to await a natural drying when on the go.