Choose Precisionware® Polypropylene Wide Mouth Bottles for pharmaceutical or similar packaging of both liquid and dry materials. Bottles are Boston Round in style, water-clear and molded from FDA compliant material. Matched polypropylene caps have a valve-seal design for a perfect, leak proof fit. Deep square threads withstand vibration and help prevent closure back-off during shipping. Ribbed caps are designed for torque-closure and easy opening. Inner bottle surfaces are smooth and rounded for easy cleaning and thorough emptying. Underside of bottle lists volume, material and includes an indexing notch. Recycling codes listed on 500 and 1000 mL bottles. A protruding ring under the cap holds shrink-wrapping securely in place. Autoclavable 121°C (250°F) Do not autoclave with caps in place.