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Pack prices at any Richmond Hill convenience store run $14$20 CAD, with more than 70% of the shelf price going to government taxes before the retailer adds its margin

This makes a huge difference in durability

Balance of airflow is another critical issue because thin papers may fold if air is blowing through them non-uniformly

Gilbert, interviewed years later said that the modern e-cigarette is obviously based on his original design, and when pressed to say why it never took off in 1963, he could only surmise that the companies he showed it to simply wished to wait until his patent expired to launch their own versions, or, in the case of the tobacco companies, quashed it to protect their established product line