UltraSAFE buckets are special containers equipped with a unique one-way valve, specifically designed to prevent the escape of formalin fumes during operation and to dispense formalin using UltraSAFE’s automatic injection nozzle. An additional valve cap seals the bucket for extra safety during transportation. On the bucket’s lid, a unique 2D barcode, associated with the biospecimen ID number, ensures biospecimen traceability. On the bucket, users can attach adhesive label, automatically printed by the UltraSAFE unit, displaying crucial information such as Case ID, date, time, specimen details, and fixative weight.