What the tobacco companies knew is another story, but the general public, at least, really didn't know any better
Morris Coats, A Note on Estimating Cross-Border Effects of State Cigarette Taxes, National Tax Journal 48:4 (December 1995): 573-584, ntj-v48n04p573-84-note-estimating-cross-border.pdf?v=%CE%B1&r=35923133871196367
You can now purchase OHM in 6oz, 8oz, and 1lb resealable bags
HEPA Filters: This is a high-efficiency particulate air filter that can remove at least 99.97 percent of dust, mold, pollen, bacteria, and airborne particles as small as 0.3 microns
The Filters used a 40% smaller than standard commercial models
Frequently applied for eco-friendly packaging boxes and kraft-made paper bags