Nalgene Nm Square Hdpe 8 Oz. Space savers that tuck neatly into the corners of bags. Dishwasher safe (top rack). Withstands temperatures from -135 C (-211 F) to 135 C (275 F). Cap is independent and screws on. Specifications for Nalgene Hdpe Square Narrow Mouth: Manufacturer: Nalgene Condition: New Package Contents: Nalgene Hdpe Square Narrow Mouth The Nalgene Hdpe Square Narrow Mouth is a quality addition to the Nalgene lineup. For more great deals on Water Bottles by Nalgene please browse our Nalgene Run page.