Nalgene® square PETG media bottles with septum closure:

Nalgene PETG Square Media Bottles with Septum Cap: Sterile, shrink-wrapped on trays Nalgene PETG square media bottles are durable, shatterproof, and feature a septum cap for sterile filling via syringes or for adding additives. Capacity (metric): 500 Expanded Capacity (Anglo): 17.5 oz. Description: With septum closure Diameter (anglo): 2.95 in. Inside diameter (anglo) neck: 1.1 in. Inner diameter (metric) neck: 28 mm Number per carton: 48 Number per package: 24 Type: Square Bottle Certification/Compliance: Meet USP Class IV standards. Noncytotoxic. Closure Included: Yes Closure Size: 38 to 430 mm Diameter (metric): 75 mm Graduated: Yes Height (Anglo): 7 in. Height (metric): 178 mm Opening: Wide Shape: Square Unit Size: Case of 48