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. This is the type of sphere we will use for the top of our entry courtyard fountain.
A rather striking water feature beautifully lit. One wonders what's going on in the rest of the garden - black limestone paving/Ophiopogon planiscarpus 'Nigrescens'/Astelia chathamica 'Silver Spear'? ... the creative juices are flowing!