what does a filter do on a cigarette Who Made That Filter? Designing A Safer Cigarette

WTP for accessibility was negative, with a marginal decrease of 5.48 JPY for Japan and 84.42 IDR for Indonesia per additional minute required to reach return points

A subsequent study described three reduced toxicant prototype (RTP) cigarettes with combinations of these blend and filter technologies that resulted smoking machine yield reductions of 10% to 95% for a range of tobacco smoke toxicants as compared to scientific controls and typical commercial products with equivalent ISO tar yields (McAdam et al.2012)

Further reading "Electronic nicotine delivery systems" (PDF)

two community hospitals, UCSF Health St