Healthline states there are around 8,000 e-liquids in the market today which may have lung corroding ingredients.[27] Here are common harmful ingredients found in vapes: Formaldehyde a respiratory tract irritant, can cause narrowing of the bronchi and fluid accumulation in the lungs[28] Cinnamaldehyde cinnamon flavor, disrupts normal cell physiology, may influence the development of respiratory disease, impairs normal airway cilia motility[29] Vanillin vanilla flavor, can impair blood vessel function which is a sign of heart damage[30] Diacetyl microwave popcorn flavor, can cause irreversible lung disease called bronchiolitis obliterans[31] Acetoin Acetyl propionyl Acrolein Acrylamide acrylonitrile Benzaldehyde Cinnamaldehyde Citral Crotonaldehyde Ethylvanillin Eucalyptol O-vanillin Pentanedione (2,3-pentanedione) Propylene oxide Pulegone Possible Link to Seizures In April 2019, the FDA released a statement about possible seizures following e-cigarette use.[32] Health officials received reports of youths and young adults who experienced convulsions after vaping

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Other e-cigarette brands may sell products which may need you to self-fill up the tank with an e-liquid and require a bit of ongoing maintenance, but not with SMOKO
Confiscation and Penalties at Customs: While personal use of vapes might exist in a legal grey area if you already possess a device within the country, importing them is illegal
To be fair, the shortcomings of the Nest Protect are largely the fault of the strict government requirements imposed upon it by the UL, or Underwriters Laboratory