I’ve also found some nice nylon options ... I just need a bag with a handle-drop length, so I can shove it over my shoulder while wearing a puffy jacket that holds a laptop, water bottle ...

It has been likened to the magical carpet bag carried by Mary Poppins who, in the eponymous 1964 musical, pulls a hat stand and lampshade out of her holdall. The nylon "round mini shoulder bag ...