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.
Made with blanched almond and tapioca flour. No eggs or dairy. Can be made in 20 minutes or less. Dough stores well in the fridge for several days. We made wraps, burritos and this is perfect for scooping up stews