flixkun ta  high density polyethylene (hdpe) abjad b tapp magħmul minn żewġ partijiet reżistenti biex ma jiftħuħx it tfal (il qoxra ta  barra magħmula minn high density polyethylene abjad u ta  ġewwa minn polyethylene naturali) b inforra tal foam magħmula minn low density polyethylene (ldpe)