ronson vintage lighter cigarette case and Holder, 1930s, Mastercase, Art Deco. – Roadshow Collectibles Vintage 1930s Ronson Art Deco

Read my post on respirators

Briefly, research staff used a digital timestamp feature in an open-source video editing software to estimate start and end times for individual puffs based on various physical cues (e.g., inhaling, glowing cigarette tip), prioritizing overall puffing behaviors (e.g., multiple occurrences of tip glowing without removing the cigarette from the mouth [stutter puffs] were treated as a single puff)

They are mostly sold loose or in packs at roadside kiosks and small informal shops known as spazas

The filters are made of plastic, leach toxic chemicals into the environment, and are a known fire hazardlinked to nearly 89,000 acres of California wildfires since 1980