This "Triple Bespoke Glass Sphere Water Feature" by Tills Innovations in the UK uses a polycarbonate sphere that fills with water and has water flowing down the outside of the sphere. One glass globe would be enough.
The stunning Volute water feature by Tills Innovations. A vortex being captured and displayed in clarity and detail. What appears to be a solid piece of glass with a spinning vortex. A mesmerising water feature waterfeaturespecialist.
How to Make a Garden Fountain Out of, Well, Anything You Want