Vape juice has a shelf life, and it shortens once the bottle is open. The liquid is built on food based ingredients, vegetable glycerin (VG) and propylene glycol (PG), so the expiration date printed on a bottle deserves attention. Below is what to check before returning to a juice that has sat untouched for a while.
Shelf life, sealed and opened
Stored properly, most e-liquids keep for up to two years. Opening the bottle breaks the vacuum seal and lets air reach the liquid, so buy amounts you expect to finish within 2-3 months. Screw the cap on tightly before putting a bottle away.
When you come back to a bottle after a long gap, check three things:
- Smell: sniff it before you fill a tank.
- Color: e-liquid darkens as the nicotine steeps, and the throat hit can get stronger or weaker. A later article covers browning in detail.
- Consistency: liquid left too long can thicken and grow denser, and that ends in a clogged coil.
For smaller quantities, see our earlier article on how long a 30mL bottle lasts.
Past the expiration date
Few people look for an expiration date on vape juice, and not all bottles carry one. Make a mental note of the purchase date, particularly for a bottle you will get through slowly. Some ingredients in vape juice can be dangerous to vape once that date has passed.
As with food, the date is usually a recommendation: some products last a little beyond it and others go off sooner. E-liquid used after its date may well be discolored, weaker in nicotine and flavor, and may make less vapor.
When the taste is off
Depending on the flavorings, a juice can taste great at first and fade later. As nicotine steeps and ingredients break down, the flavor loses its original strength. Some expired flavors taste outright disgusting, so be careful with any you have not used for some time. Nicotine can turn sharper or flatter with age, and the first puff of an expired juice can be harsh on the throat.
Once the ingredients begin to separate, the original taste may not come back. The fix to try is a vigorous shake before use. That habit helps with unopened bottles as well: if you buy in bulk, shake each one before filling the tank, because well-mixed juice gives a purer flavor.
Storage rules
- Keep juice you will not use for a while in a cool, dark place. Direct sunlight or heat makes the ingredients expire faster.
- Keep it away from other liquids such as water, soups, beverages and household chemicals.
- Finish the bottles you have already opened before starting another, however appealing a large collection looks.
- If you try new flavors often, start with small bottles to confirm you like them, then move up to larger ones you know will not be wasted.
- Do not freeze ejuice. Freezing extends the life of many foods, but not e-liquid: the consistency changes and the taste may not be what it was.
Glass or plastic
For long-term keeping, glass bottles are the better pick. Plastic tends to let more light and air reach the liquid, and that can cause the ingredients to separate. Squeezing a plastic bottle into a tank is handier than using a dropper, so let how often you will use the juice decide. A big plastic bottle that expires before you finish it does you no good.
The short version
No exact science fixes the day an e-liquid goes bad, and a bottle is not automatically useless once its date passes. Expiration dates exist to make people aware of how long a product can sit. The simplest way to avoid waste is to match what you buy to how much you vape: a 30mL bottle may see a new vaper through a week or a month, heavy users may get through several 120mL bottles in a year, and picky vapers can test a flavor with a small bottle. If a flavor does not appeal, swap it with another vaper instead of leaving it in a cupboard, or wait a few weeks and try it again.