The top three countries by number of reports for hiccups were the United States, Japan, and the United Kingdom, with 399, 113, and 47 reports, respectively (Figure 1)
This token amount is all that is required for the manufacturer to claim that their machine 'contains' carbon and therefore removes gaseous pollutants
For instance, in one study, it was observed that the association between smoking and squamous cell carcinoma of the skin, a type of skin cancer, presented a higher risk for current smokers (relative risk: 3.3) than for former smokers (relative risk: 1.9)
Of course, I would not advise you to smoke them all the time after all, the flavor is specific and can get boring