Ozone Glass Cups with Double Walls. This glass cups with double walls are specially designed for making ozonated water. It has a bubbler inside the glass cup and two luer connectors on the top, one for injecting ozone gas, another for extra humidified ozone gas coming out. It is very easy to make ozonated water as well as humidfy the ozone gas for ozone treatments. The cup is beautifully designed and will make the ozonation process very easy, saving you time every day. SPECIFICATIONS Name Ozone Glass Cup Function Make ozonated water / oil Material Double walls of glass Volume 520mL Connection luers connector for quick connection Built-in Ozone Bubbler 5um stainless steel bubbler Color Clear