There is no concrete conversion due to the many different types of absorption rates and delivery methods, as well as user behaviour, but it is typically close to 1 ml of 20 mg/ml nicotine strength e-liquid, which is roughly equivalent to 20 cigarettes a day
Tobacco companies have long used flavourings to overcome this drawback and make their product more palatable to prospective clients
One source from the 1990s titled Pipe Smoker
Ingredients: Organic and/or wildcrafted Damiana, Blackberry Leaf, Rose, Hibiscus, Mullein
It is designed for car interiors, as some standard odour eliminators may also include rigid chemical substances that can damage your car's interior
Screens or end caps: Many filters include small screens at one or both ends