Anti-Splash Adapters With Perforated Plate Glass Disc provided by STE-Mart are connected between a rotary evaporator and the evaporating flask to the discharge of foam pollutants into the condenser of the rotary evaporator. The upper joint is an outer joint, while the lower joint is an inner joint which extends up to the inside of the bottle. The adapter features a perforated plate glass disc sealed above lower inner joint to reduce foam.