I picked up some of those cones from Aldi's and they are an ideal size for a pannier
. Aldi's also had some other small plastic pieces ( I don't know what they called them) but they have an angled surface around them. If anyone has them and you are using them say in place of cones or tennis balls cut in half.
Just be aware that if you hit a cone or a tennis ball, no sweat.
But strike one of these little suckers with some lean on the bike and the bitumen is probably going to be the next thing you touch. Just saying.
You will find if you go to
www.RideLikeAPro.com run by Jerry Palladino in the USA he mentions these little suckers.
Hope it might save someone from a spill.