Packet of 10 'Filtro Neto' filters, to fit on the mouth end of cigarettes, marked: 'If you must smoke, protect your health; reduces the intake or tar and nicotine without changing the taste of the cigarette', produced by Larkhall Laboratories, London, 1999.

The front of this box carries the message “If you must smoke protect your health”. The makers of ‘Filtro Neto’ cigarette filters claimed their product would reduce the intake of tar and nicotine without changing the taste of a cigarette (tar is dangerous as it has potentially cancer causing properties).

Cigarettes would be inserted into the filters and then smoked as normal. It was suggested that each filter could be used five to ten times before it lost its effectiveness.