An atomizer includes a first glass tube, a second glass tube, a heating element, and a base. The first glass tube includes a first hollow column and the second glass tube is partially disposed in the first hollow column and is integrated with the first glass tube. The heating element is in the shape of a disc. The heating element includes a central hole. The base includes a top portion and the heating element is disposed on the top portion. The first glass tube further includes a first opening configured to receive the base. The heating element is disposed in the first opening. The second glass tube is disposed above the central hole; a space between the first glass tube and the second glass tube is configured to store e-liquid; and the second glass tube further includes a second hollow column functioning as a smoke or vapor passage.