An assembly including a plastic container and a component attached to the container with an attachment system, the container having a circular attachment portion. The attachment system includes a ring shaped member including a top flange, a bottom flange and a frustoconical side wall connecting the top flange and the bottom flange, the bottom flange and a portion of the frustoconical side wall being embedded in the attachment portion, the ring shaped member further comprising peripheral tabs; a plurality of engaging claw parts, each engaging claw part being configured to engage a peripheral tab and to press the component against the attachment portion.