CU Cancer Center Leaders Applaud Denver's Ban on Flavored Tobacco Sales In what is being called one of the city's most expensive races on this year's ballot, Denver voters are leaning heavily toward keeping the city's ban on the sale of flavored tobacco, Denver's Flavored Tobacco Ban: Stock Up Before It's Too Late Vaping Land Denver ban on flavored nicotine products goes into effect with new year California's Ban on Flavored Tobacco Upheld by US Supreme Court KQED