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Glass Chimneys & Tanks: Borosilicate glass components that form the central tube (chimney) and the e-liquid reservoir (tank) in rebuildable tanks and sub-ohm tanks. They must be manufactured to exact dimensions to ensure a perfect seal and are prized for their flavor purity and resistance to heat.Adjustable Airflow Disposables: Feature a mechanical dial or slider that allows the user to control the amount of air entering the device. A tighter airflow creates a restrictive, cigarette-like draw (MTL), while a looser airflow allows for a direct-to-lung (DTL) inhale. This customization caters to personal preference and enhances user satisfaction.https://cbu01.alicdn.com/img/ibank/2017/443/185/4170581344_1099731935.220x220xz.jpgSpecial Edition Pod Kits: Limited-run versions of popular pod systems featuring unique colorways, artistic designs, or collaborations with other brands or artists. These create collector's items, generate marketing buzz, and allow brands to target specific niches or aesthetics.E-Liquid Box Packaging: Smaller cardboard boxes designed to hold a 30ml, 60ml, or 120ml glass or plastic e-liquid bottle. They provide protection from light (which can degrade nicotine and flavor) and offer ample space for branding, ingredient lists, warnings, and government-mandated tax stamps.