how long has cigarettes been around Smoking - Health Risks, Addiction, History Smoke gets in your eyes:

For example: Electronic cigarettes rely on refill liquids that contain ingredients like propylene glycol and vegetable glycerin, which also degrade over time These liquids may have clearer expiration date labels compared to cigarettes This highlights how product design and composition influence longevity and consistency

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User's recommendation: What can you say you don't know till you open

Prolonged exposure to lingering cigarette smoke odor has the potential to cause allergies and cancer

When you smoke, blow the smoke through the other end of the tube

But a 2020 study suggested current e-cigarette users have about a A Certain vape products may contain diacetyl, a chemical that manufacturers use to add a buttery flavor to some vape juices. Diacetyl links to the development of popcorn lung, a condition involving permanent scarring to your airways