What's Inside Your Vape Pen What E-Cigarettes Are Made of and How It Affects the Taste

In this article:

— The battery: power and stability
— The coil: where taste begins
— The wick: the unsung component
— E-liquid composition: PG, VG, and flavourants
— The tank and casing: materials matter more than you think
— Why cheap devices taste cheap

Most users treat the battery as an afterthought — something you think about only when it dies at an inconvenient moment. Charge it, forget it, repeat. But the battery is the foundation of everything that happens inside your device, and stable power delivery is directly and unavoidably connected to the consistency of your experience.

Here’s where it becomes relevant to taste inconsistent voltage means inconsistent heat. And inconsistent heat means your e-liquid isn’t being vaporised at the same temperature as every puff. One draw might run slightly cool, producing thin, underdeveloped vapour that tastes flat and muted. The next might run slightly hot, scorching the edge of the wick and introducing a faint bitterness that has no business being there. Premium devices invest seriously in power regulation circuitry precisely because stable temperature equals stable taste. Many users blame a perfectly good liquid for problems that are entirely the device’s fault — an invisible compromise that only reveals itself on the palate over time.

The coil is the resistance wire that heats your e-liquid and converts it into vapour. Everything about the quality of your experience passes through it. Its material shapes the entire character of what you taste:

- Kanthal — the traditional choice. Durable, affordable, widely used. Runs warm and suits certain styles of vaping but can slightly distort more delicate taste profiles

- Stainless steel — runs cleaner and cooler, producing a more neutral, transparent experience where the liquid tastes more like itself without the coil adding its own character

- Mesh coils — instead of a wire spiral, mesh uses a flat grid structure that creates a dramatically larger heating surface. The result is more even heat distribution, faster ramp-up time, and noticeably better clarity and depth of taste. The difference between a standard wire coil and a quality mesh coil running the same liquid in the same device is not subtle — it’s detectable on the very first inhale

Coil resistance is another variable worth understanding. Lower resistance coils run hotter and produce more vapour — the sub-ohm territory favoured by users who prioritise cloud production and a warmer, more intense experience. Higher resistance coils run cooler and deliver a tighter draw that feels closer to a traditional cigarette. Neither is objectively better. They suit different preferences, different nicotine strengths, and different liquid formulations.

The wick absorbs e-liquid from the tank and delivers it to the coil at exactly the right rate. When it works perfectly, you don’t notice it at all. When it fails in either direction, the consequences are immediate and unpleasant. Pack it too tightly and e-liquid can’t flow freely enough to keep pace with the heat — leading to dry hits that are harsh and acrid even on a brand-new device. Pack it too loosely and you get flooding — excess liquid that gurgles, spits back into the mouthpiece, and produces a wet, diluted experience that suppresses whatever profile you’re trying to taste.

Most modern devices use organic cotton, which absorbs efficiently and — when genuinely high quality — introduces no taste of its own. Budget devices use lower-grade cotton that carries a faint grassy or papery note, most detectable in the first few puffs of a new coil. Many users interpret this as a sign that the liquid itself is off. In most cases, it’s the wick.

The base of virtually all e-liquids consists of two carrier substances: propylene glycol and vegetable glycerin — PG and VG. Their ratio has profound and immediate effects on the experience. PG is thin and carries taste compounds exceptionally well, producing sharp, defined, accurate profiles and a stronger throat hit. VG is thicker and naturally slightly sweet, producing dense clouds and a smoother experience — but its character can slightly blur the more delicate notes in complex profiles.

Nicotine comes in two primary forms:

- Freebase nicotine — the traditional format. Delivers a strong throat hit and has a harsher character at higher concentrations

- Nicotine salts — combine nicotine with an organic acid, allowing significantly higher concentrations without harshness. Smoother, cleaner, and now dominant in most pod systems and disposables

The taste compounds themselves — what makes a liquid taste like mango or spearmint or warm vanilla — are food-grade flavourants, natural or synthetic or both. Premium flavourants are complex, accurate, and layered. Cheap alternatives are flat and carry a faint chemical background note that no added sweetener can fully mask. The quality difference is immediate and unmistakable.

Glass tanks are chemically inert — what you put in is what you get out, without modification. Polycarbonate tanks are adequate for most e-liquids but can gradually degrade by high concentrations of citrus compounds, slowly leaching a faint chemical note into the liquid over time. It’s subtle but detectable to anyone paying attention, and it’s one reason experienced users tend to gravitate toward glass for acidic profiles. The mouthpiece material also plays a role — cheaper plastics can carry a faint synthetic aftertaste that becomes more noticeable as the device warms up during extended use.

A budget device isn’t cutting one corner — it’s cutting all of them simultaneously:

- Inconsistent battery output that destabilises temperature with every puff
- Standard wire coils instead of mesh, producing flatter and less defined taste
- Lower-grade cotton that contributes its own flavour for the first several uses
- Polycarbonate tank that reacts with citrus profiles over time
- Synthetic flavourants at minimum viable concentration, flat and slightly chemical

Each compromise, taken alone, might be barely noticeable. Stacked together, they compound into an experience that tastes flat, occasionally burnt, and rarely like what the packaging promised. This isn’t an argument for spending maximum money on hardware — the market today is competitive, and excellent devices exist at reasonable prices. But understanding what’s inside you vape pen changes how you evaluate your options. Materials are not neutral. What’s inside the device is, in every meaningful sense, the experience itself.