Menthol and Ice Vapes: The Science Behind Cooling Agents and Ireland’s Best Minty E-Liquids

The menthol and ice category is one of the largest and most consistent segments of the Irish vaping market. Walk into any specialist retailer or browse the vapes available online and menthol variants will appear across every format — disposables, pods, shortfills and nic salt bottles. Yet the “cooling” experience these products deliver is not simply mint flavour: it is the result of specific chemical compounds interacting with cold-sensitive receptors in the mouth, throat and lungs in a way that produces genuine physiological sensation. Understanding the science behind cooling agents explains why different products feel so different despite similar flavour descriptions.

Menthol vs Synthetic Cooling Agents: A Chemical Distinction

Natural menthol is a cyclic terpene alcohol derived from peppermint and other mint oils. It activates TRPM8 receptors — thermosensitive ion channels in the oral and nasal mucosa that normally respond to temperatures below approximately 25°C — producing a cooling sensation that is physiological rather than purely perceptual. The brain’s temperature processing system interprets TRPM8 activation as cold regardless of whether the stimulus is a temperature change or a chemical compound. This is why menthol feels physically cold even at body temperature.

Natural menthol has a strongly herbal, camphoraceous quality alongside its cooling effect — a “toothpaste” or “sweet mint” character that is familiar from confectionery and oral care products. In e-liquid applications, it produces a moderately cooling draw with a prominent mint flavour note.

WS-23 and WS-3: The Synthetic Cooling Revolution

The majority of “ice” and “frost” e-liquids in the current Irish market do not use menthol as their primary cooling agent. They use synthetic alternatives — most commonly WS-23 (N-Ethyl-p-menthane-3-carboxamide) and WS-3 (N-Ethyl-2,2-diisopropylbutanamide, also known as koolada). These compounds activate TRPM8 receptors with significantly greater potency than menthol at equivalent concentrations, producing an intensely cold mouthfeel and throat hit with minimal or no mint flavour contribution.

This distinction is commercially important. WS-23 allows manufacturers to create “ice” variants of fruit, candy, and beverage flavours without the herbal mint note that natural menthol would impose. An “iced mango” using WS-23 tastes like mango with a cold sensation; the same product using menthol would taste like mango with mint. The WS-23 approach produces a cleaner, flavour-preserving coolness that has driven the widespread adoption of ice variants across almost every flavour category in the market.

WS-3 vs WS-23: The Sensory Differences

WS-3 (koolada) produces a clean, intense cooling effect at the front of the mouth with rapid onset and relatively fast dissipation. It has a slightly smoother character than WS-23 and is less likely to produce throat irritation at higher concentrations. WS-23 produces a deeper, more penetrating coolness that extends into the throat and is slower to dissipate, giving a prolonged cold aftertaste. At high concentrations, WS-23 can produce a numbing effect that some users find unpleasant; at moderate concentrations, it delivers the intense “arctic” experience that has made high-cooling e-liquids popular.

Many premium e-liquid manufacturers use blends of menthol, WS-23 and WS-3 to create layered cooling profiles — immediate freshness from WS-3, depth and persistence from WS-23, and herbal complexity from natural menthol. Reading ingredient lists and understanding these components allows more informed choices between products that may have similar marketing descriptions but very different sensory profiles.

Leading Menthol and Ice E-Liquids Available in Ireland

• IVG 2400 Menthol Series: The IVG 2400’s menthol pod variants — particularly Cool Watermelon and Blue Raspberry Bubblegum Ice — use a WS-23/WS-3 blend that delivers sustained cooling without overpowering the fruit base. Consistently rated among the best cooling disposable products in the Irish market.
• Dinner Lady Lemon Sherbet Ice: The shortfill market’s most awarded menthol variant. High-VG base with a natural citrus and sherbet profile underlined by clean WS-23 cooling. Available in nic salt format for pod systems.
• Bar Series Spearmint: Uses natural spearmint flavouring with light WS-23 enhancement. A more complex and less synthetic menthol experience than most ice disposables, well-suited to vapers who want genuine mint rather than a cold sensation divorced from flavour.
• Nasty Juice Sicko Mint: A menthol-forward shortfill with high cooling intensity using WS-23 at above-average concentration. One of the few products where the cold sensation is the primary experience rather than a flavour complement.
• Lost Mary Sour Apple Ice: Uses WS-23 to enhance the tartness of the apple profile — the cooling agent amplifies the perception of sourness through temperature-taste interaction — producing a multi-sensory experience that is among the most distinctive in the ice category.

Health Considerations Around Cooling Agents

WS-23 and WS-3 are used in food, confectionery and cosmetic applications globally and are generally recognised as safe for consumption at typical use concentrations. Long-term inhalation studies are limited, as is the case for most flavouring compounds in e-liquids. Current evidence does not identify specific hazards from inhaled cooling agents at the concentrations used in commercial e-liquids, but the general caution that applies to all flavour compounds — avoiding very high concentrations, maintaining devices that do not overheat liquids, and using TPD-compliant products from established manufacturers — remains appropriate.