PYREX Gas Washing BottlesPYREX Gas Washing Bottles PYREX Brand Drechsel. Gas humidifier bubbler. Features: Standard Taper stopper incorporates a plain dip tube as the distributor Large hexagonal base for stability Standard Taper stopper size 29 42 125mL bottle is 335mm tall, 250mL bottle is 340mm tall, and the 500mL bottle is 390mm tall. Specifications: Mfr. No. 1760 125 Bottle, Gas Washer 125 ml, 335 mm Mfr. No. 1760 250 Bottle, Gas Washer 250 ml, 340 mm Mfr. No. 1760 500