The 21mm HDPE screw cap fits to a 21mm neck size. The ratchet tamper evidence band grants integrity of the filled product - it breaks after opening the screw cap. An EPE washer secure the tightness of the package. That closure, usually used for bigger containers, will be opened before pouring to allow an air intake during emptying of the container. Thus pouring of a big container become easy and glug-free.