Types of Vapes Explained: Pods, Pens, Mods & More

"Vape" covers a surprisingly wide range of genuinely different devices, and the terms get used loosely enough that it's easy to end up confused about what actually separates a pod kit from a pod mod, or a vape pen from a box mod. Each category is built around a different combination of battery type, tank or pod format, and airflow style, and those differences affect everything from how much maintenance a device needs to which e-liquid you should be putting in it. This guide breaks down each major device type on its own terms, plus the mechanical distinction (mouth-to-lung versus direct-to-lung) that runs underneath almost all of them.

Types of Vapes in UK

Pod kits

Pod kits are the most common device type on the UK market today, built around a small, sealed or refillable pod that clicks into a compact device body. They come in two forms: prefilled pods, which arrive already filled and are discarded and replaced once empty, and refillable pods, which you top up yourself from a bottle of e-liquid. Pod kits are generally designed around mouth-to-lung vaping and nicotine salt e-liquid, which pairs well with their smaller pod capacity and lower power output. This category is covered in detail elsewhere on our site, so if you want the full breakdown of how prefilled pod kits work, our guide to what a prefilled pod kit is covers it properly. Our pod kits collection and prefilled pod kits collection cover the current range.

Vape pens

A vape pen is a simple, pen-shaped device that sits between the smallest pod kits and a full box mod setup. It typically has an integrated, non-removable battery and a small refillable tank rather than a pod, with little to no adjustable settings, usually just a fire button and not much else. Vape pens are generally aimed at straightforward mouth-to-lung or lightly restricted direct-to-lung use, without the wattage or temperature control of a mod, which makes them a lower-maintenance option for someone who wants a refillable tank without the extra configuration a box mod involves.

Box mods

A box mod is a standalone power unit, usually rectangular, with variable wattage and often temperature control settings, designed to be paired with a separate tank rather than including one built in. Box mods commonly use removable batteries (18650 or similar cell formats being the standard), which means the device itself can keep running as long as you have charged spares, rather than needing to plug in and wait. Because a box mod is sold as a bare power unit, you choose your own tank separately, which is where sub-ohm tanks usually come in.

Sub-ohm tanks

A sub-ohm tank is built around a coil with a resistance below 1.0 ohm, which needs more power to run than a standard pod coil and produces significantly more vapour as a result. Sub-ohm tanks are the standard pairing for a box mod and are built for direct-to-lung vaping, an open, airy draw rather than the tighter pull of a mouth-to-lung pod kit. They're generally used with high-VG shortfill e-liquid at 0mg or a low freebase nicotine strength, rather than nicotine salts, since nic salts are formulated for the lower-power, mouth-to-lung style pod kits use, not the higher wattage a sub-ohm coil needs. Most sub-ohm tanks use a standard 510 connector, the same threaded fitting used across the vast majority of box mods, which is what allows you to pair a tank from one brand with a mod from another. Our vape tanks collection covers the current range.

Pod mods (AIO devices)

Pod mods, sometimes called all-in-one (AIO) devices, sit in a genuine hybrid category between a standard pod kit and a full box mod, and this is the category competitor content most often blurs into one or the other rather than treating on its own terms. A pod mod looks like a pod kit, using a pod rather than a separate tank, but includes adjustable wattage settings more typical of a box mod. This gives more control over vapour production and throat hit than a fixed-output pod kit, without moving up to a full external-battery mod and separate tank setup. Pod mods commonly support both nicotine salt and freebase e-liquid depending on the wattage range they're set to, which makes them a flexible middle option for someone who has outgrown a basic pod kit but doesn't want the size or complexity of a full sub-ohm setup.

Mouth-to-lung versus direct-to-lung, the mechanical difference underneath all of this

Most of what separates these device types comes down to one core mechanical distinction: mouth-to-lung (MTL) versus direct-to-lung (DTL) draw style. MTL vaping draws vapour into the mouth first, then down into the lungs in a second, separate action, using a tighter, more restricted airflow. It's generally more flavour-forward with a smaller cloud, and it's what pod kits and vape pens are built around. DTL vaping draws vapour straight into the lungs in one open, airy pull, and it's what sub-ohm tanks and higher-wattage pod mods are built for, producing considerably more vapour at the cost of some of the tighter draw and flavour concentration MTL delivers. Neither style is objectively better, they're simply built around different airflow and coil setups, and the device type you pick largely determines which one you get.

Why some tanks hold more than 2ml if there's a legal cap

This trips a lot of people up, and it's worth explaining properly rather than glossing over. Under the Tobacco and Related Products Regulations 2016 (TRPR), the UK's implementation of the EU Tobacco Products Directive (TPD), nicotine-containing e-liquid sold in a tank or pod is capped at 2ml, and a separately sold nicotine-containing refill bottle is capped at 10ml. However, that capacity limit specifically applies to liquid that contains nicotine. Zero-nicotine e-liquid is not covered by the TPD's volume restrictions at all, and is instead covered only by general consumer product safety rules, which is why nicotine-free shortfill e-liquid is legally sold in much larger bottles, commonly 50ml or 100ml.

This is exactly why sub-ohm tanks, which are frequently built with a 3ml, 4ml, or larger physical capacity, aren't in breach of the 2ml figure: they're designed around being filled with a 0mg or very low-strength shortfill liquid, with nicotine strength brought up afterwards by adding a separately sold nicotine shot, itself capped at 10ml and 20mg/ml under the same regulations. The tank's physical capacity as hardware isn't restricted, only the volume of nicotine-containing liquid that goes into it, which is why the two figures you'll see (a 2ml pod cap for nic salt pod kits and a much larger tank size for sub-ohm setups) aren't actually contradictory once you know which part of the liquid the cap applies to.

Rebuildable atomisers, the niche end of the spectrum

Beyond the device types above, there's a smaller, more advanced category worth knowing exists even if it isn't where most vapers end up: rebuildable atomisers, commonly RDAs (rebuildable dripping atomisers) and RTAs (rebuildable tank atomisers). Rather than using a pre-made replaceable coil, these let the user build and wick their own coil from raw wire and cotton, giving full control over resistance and airflow at the cost of significantly more hands-on setup and maintenance than any pre-built coil system. RDAs, sometimes called drippers, require e-liquid to be manually dripped onto the coil rather than held in a tank, while RTAs combine a rebuildable coil deck with a tank reservoir. This category sits well outside what a beginner or casual vaper typically needs, and is generally aimed at experienced users who specifically want that level of control over their setup.

Battery format and how it affects each device type

Battery format is one of the clearer dividing lines between device types. Pod kits, vape pens, and pod mods generally use an integrated, non-removable battery charged directly via USB-C, which keeps the device compact but means charging time is a fixed part of your day rather than something you can work around with a spare. Box mods, by contrast, generally use removable battery cells such as 18650s, which means you can keep a charged spare on hand and swap it in the moment a device runs flat, at the cost of a larger, bulkier device body and the need to manage battery cells and a separate charger correctly.

Matching wattage to coil resistance

Whichever device type you're using, the coil's printed resistance and recommended wattage range are worth checking rather than guessing at, since running a coil well outside its intended range affects both flavour and coil lifespan. As a rough guide, a coil resistance below 1.0 ohm (the sub-ohm range) generally needs a higher wattage, often upwards of 40W, to perform properly, while pod-style coils sitting above 1.0 ohm are designed for the lower, often fixed wattage a pod kit already runs at. Running a coil too far below its printed range tends to leave the flavour muted and the vapour thin, while running it too far above shortens the coil's lifespan considerably and can produce a harsh, burnt taste well before the coil would otherwise need replacing. If you're troubleshooting a burnt or weak-tasting coil, our guide to fixing a burnt vape covers this in more depth, and our coils collection covers current replacement options.

Mixing and matching hardware

Most tanks and box mods use a standard 510 threaded connector, which means a tank from one manufacturer will generally screw onto a mod from a different manufacturer without issue, provided the mod can supply the wattage the tank's coil needs. Pod kits and pod mods don't follow this same universal standard, since pods are generally proprietary to their specific device, so a pod from one brand's kit won't fit a different brand's device the way a 510 tank will fit a different mod.

How to choose between them

If you want the simplest possible setup with minimal maintenance, a pod kit is the standard starting point. If you want a refillable tank without a mod's extra settings, a vape pen sits in between. If you want more control over wattage and battery life without stepping up to a full sub-ohm tank, a pod mod is the middle ground. If big vapour production and an open direct-to-lung draw are what you're after, a box mod paired with a sub-ohm tank is the setup built specifically for that.

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