In the past few years, we have covered plenty of amazing wave machines. The Lava Simplex Wave Machine is also worth a look. It comes with a 16-inch vessel to put a mesmerizing show as it is rocked back and forth on the base. This particular version has an Adriatic Black Base and a UV reactive blue vessel from Hughes Wave Machines.
The Lava Simplex Wave Machine is pretty rare but once in a while show up on eBay.