Over the years ive tried putting my bucket in the boot of the car and in the front passenger side on a couple of occasions went round a corner too fast car full of water, these days i put it through the last couple of rungs of my ladder with tools and liquid in it, but one thing i do notice if your water is quite soapy if you are going fast on a windy day the car behind seems to back right off as the suds seem to fly towards them. This is a good way to stop them from driving up your a*se ( bum ) . But you loose a bit of water when you go over those speed humps , one day i left my bucket at the front of the car and ran over it ..one squashed bucket
brett