Strangler smoking article and solidarity camera

A filter (14) for smoking articles comprising plugs (30) downstream of material upstream filter (20) and a hollow member (22) therebetween, the hollow member having a frustoconical section (24) extending from a central portion thereof to an upstream end and fluted section (26) extending from the central portion to a downstream end, the frustoconical section (24) including one or more orifices (34) through which communicates with one or more gaps (28) between the walls of the channel section (26).