Anyone browsing a vape Ireland retailer for the first time is likely to hit the same wall within about thirty seconds: the terminology. Nic salts, shortfills, sub-ohm, coil resistance, mg strengths, prefilled pods. None of it is explained on most product pages, because the sites are built for people who already know what they're looking for. If you don't, ordering the wrong thing is easy to do. Here's a plain-language glossary covering the terms that actually matter before placing a first order.

Nicotine strength: mg, and why the number matters more than it looks

Every e-liquid bottle carries a number followed by "mg", usually somewhere between 0 and 20. This refers to milligrams of nicotine per millilitre of liquid, and it's the single most important number on the label if you're switching from smoking. As a rough guide, someone smoking around 10 to 15 cigarettes a day often finds 6mg to 12mg a reasonable starting point, while heavier smokers may need 18mg or 20mg to feel satisfied. Getting this wrong in either direction, too low and cravings persist, too high and the experience feels harsh, is probably the most common reason new vapers give up early.

Freebase nicotine vs nicotine salts

These are the two main chemical forms nicotine takes in e-liquid, and the difference is noticeable in practice, not just on paper. Freebase nicotine is the traditional form, and it tends to feel harsher in the throat at higher strengths, which is why freebase e-liquids are usually sold at lower mg levels, often 3mg or 6mg, designed for use in higher-power devices that produce bigger vapour clouds.

Nicotine salts are chemically modified to feel smoother, even at higher concentrations like 10mg or 20mg. This makes them the standard choice for smaller pod-style devices, since they deliver a cigarette-like nicotine hit without the throat harshness freebase nicotine would produce at the same strength in a low-power device. If a product page mentions "nic salt" or "salt nic", assume it's designed for a pod kit, not a larger tank.

Shortfill: the confusing bottle format explained

Shortfill bottles look like a labelling error the first time you encounter one: a 50ml or 100ml bottle that's only, say, 70 percent full of e-liquid, with the rest of the space empty. This is deliberate. Shortfills are sold at 0mg nicotine, with the empty space left specifically so you can add a separate nicotine shot, usually an 18mg 10ml bottle, to bring the mixture up to your preferred strength. It's a cost-effective way to buy larger volumes of flavour while controlling strength yourself, but it does require buying the nicotine shots separately, which catches some first-time buyers off guard.

Sub-ohm and coil resistance

"Sub-ohm" refers to a coil with electrical resistance below 1 ohm, generally used in larger tank devices to produce bigger vapour clouds and a warmer, more intense flavour. Coil resistance is printed directly on replacement coils, and it needs to match what your specific device and e-liquid type are designed for. Using a sub-ohm coil with e-liquid strengths meant for pod kits, or vice versa, tends to produce either an unpleasant harsh hit or barely any flavour at all, so checking compatibility before buying replacement coils is worth the extra thirty seconds.

Pod kits, disposables, and prefilled pods: three different things people conflate

A pod kit is a small, rechargeable device using a refillable or replaceable pod, generally paired with nicotine salt e-liquid. A disposable vape ireland is a fully self-contained device, battery, e-liquid and all, meant to be thrown away once it runs out, with no refilling or recharging involved. A prefilled pod, sometimes sold separately from a device, is a pod that arrives already filled with e-liquid from the manufacturer, designed to be swapped into a compatible rechargeable device rather than refilled by hand.

This distinction has become particularly important recently, since Ireland has moved to restrict single-use disposable vapes following health and environmental concerns. Shoppers who've relied on disposables for their simplicity are increasingly being pointed toward prefilled pods as the closest reusable equivalent, since the day-to-day experience, no refilling, no coil-building, is very similar, while the device itself isn't discarded after a few hundred puffs.

Nicotine pouches: not vaping, but often sold alongside it

Nicotine pouches are a separate product category entirely, worth defining clearly since the terminology overlaps with vaping in people's minds even though the products don't. A nicotine pouch is a small, tobacco-free pouch placed between the lip and gum, releasing nicotine without smoke, vapour, or spit. They're legal in Ireland, unlike traditional oral tobacco snus, precisely because they contain no tobacco.

Pouches are typically labelled with a strength level rather than an mg-per-ml figure, since there's no liquid volume involved, and strengths vary considerably between brands like Nordic Spirit and other entrants to the Irish market. If you're new to the category, starting at a lower labelled strength and adjusting from there is generally the safer approach, the same logic that applies to choosing an e-liquid nicotine strength.

Starter kit vs advanced kit

A starter kit is designed for simplicity: minimal settings, straightforward pod or cartridge replacement, and a battery life suited to light or moderate use. An advanced kit, sometimes called a mod, typically offers adjustable wattage, replaceable batteries, and compatibility with a wider range of tanks and coils, aimed at users who want to fine-tune their vaping experience rather than just have something that works out of the box. If you're ordering your first device, product pages labelling something a "starter kit" are generally a safer bet than anything described as advanced or requiring separate battery purchases.

Why this vocabulary matters more when buying online

In a physical vape shop, a confused first-time buyer can simply ask, and a staff member will usually walk them through these terms in under a minute. Buying from an online vape shop removes that safety net, which makes clear product labelling and accessible glossary-style content useful rather than optional. Retailers who organise their catalogue clearly by category, separating starter kits from advanced devices, and nicotine pouches from e-liquids entirely, make this vocabulary gap far easier to navigate without direct assistance.

eCigarettesWorld.ie, for instance, structures its online catalogue along these exact lines, with distinct sections for starter kits, advanced devices, disposables, prefilled pods, e-liquids organised by flavour and brand, and nicotine pouches kept entirely separate, which goes some way toward reducing the confusion this glossary is trying to address in the first place.

A last note on getting it right the first time

None of this vocabulary is complicated once explained, but it is unfamiliar to almost everyone the first time they encounter it, and getting a mismatch wrong, the wrong nicotine strength, an incompatible coil, a shortfill bought without nicotine shots, is one of the most common reasons people have a poor first experience with vaping generally. A few minutes spent understanding these terms before placing an order tends to save considerably more time and frustration than working it out through trial and error afterward.