The Sport model essential oil vaporizer has a primarily metal tank with a small cutout glass opening that is actually indented. It is great to carry around a safe vaporizer. If you drop it or something, more than likely whatever it falls against will not make direct contact with the glass of vape tank. More protected and sealed as well as concealable. If you’re vaping THC, CBD or any cannabis oil – casual observer might not be able to look into the details to see what you are medicating on.