It's a floor wax AND a dessert topping!

Versatile little piece of gear? OTOH, seems like a small quirky pannier and/or a messenger bag with a bunch of hardware that I don't want rubbing on my back, my jacket, etc. Tough call. Unless it fits a real specific need for you, I'd think hard about which you really want / need and commit to one side or the other. There are plenty of panniers with carry straps and messenger bags that can lash on to your rack under a cargo net.