Closure System: Patented Epredia™ Bio-Tite™ closure system is dual-threaded, making it virtually impossible to cross-thread and minimizing leakage Pre-Filled Containers: Nonsterile containers marked with a lot code and expiration date Comply with all updated federal and state OSHA requirement Labeled with highly visible, bright yellow labels with space for patient information for instant identification to minimize health risks Ordering Information: Clear polystyrene containers have screw-top lids Opaque polyethylene containers have snap-top lids Dry containers available separately