Wheaton Lab 45™ media bottles with pour ring and caps are made from Type I borosilicate glass which helps to prevent pH changes. Wide mouth finish and graduated with writing patch. Special pour lip facilitates easy pouring. Bottles, caps and pour rings are autoclavable. Has a built-in wedge shaped sealing ring, eliminating the need for a liner. Pink Polypropylene screw cap is attached to bottle to maintain cleanliness. Graduated. 100mL Capacity. 109 H x 56mm Diameter. Clear. Pink Cap. Type I Borosilicate Glass. 45mm Cap Size. Wheaton #: W219925-P.