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.
Heres everything you need to know to build your own backyard pond. Hundreds of thousands of homeowners already have them and thousands more are installing them every year. Why all the fuss over a water-filled hole? Well, for one thing, gurgling waterfalls
Solar Powered Pond in a Pot Kit with 72cm White Planter and Fountain