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These wide-neck laboratory bottles are extremely flexible and feature a wide-mouth opening for easy filling and emptying of liquids and powders. In addition to the screw cap, a plastic plug insert comes with each bottle, providing additional leak-resistance. Simply insert the plug into the mouth of the bottle prior to closing the lid. This ensures a leak-resistant seal and makes these bottles ideal for transport and long-term storage. Confidential notes can be stored inside the bottle in the space between the plug and the screw cap. The cap and bottle neck have molded-in tagging points which are designed for securing the cap to the bottle using wire security ties. This makes the bottle tamper-evident. This bottle is approved for use with food products.