How to Use Nicotine Shots with Shortfills: Step-by-Step

Shortfill e-liquids have become one of the most common choices for UK vapers, particularly those using sub-ohm devices. Because UK and EU regulations limit nicotine-containing e-liquids to bottles of 10 ml or less, manufacturers sell shortfills as larger bottles of nicotine-free e-liquid with space left at the top. This allows users to add nicotine separately in a controlled way.

Nicotine shots exist specifically for this purpose. When used correctly, they allow you to customise nicotine strength without changing flavour balance or vapour performance. This guide explains exactly how to use nicotine shots with shortfills safely, accurately, and consistently, without damaging flavour or causing harsh hits. If you’re new to mixing, it’s also worth understanding how to mix vape juice safely before you begin.

TL;DR

Shortfills are sold without nicotine due to UK regulations, and nicotine shots allow you to customise your nicotine strength. To mix correctly, check your bottle size, add the right number of nicotine shots, shake thoroughly, and let the liquid settle before vaping. Matching the VG/PG ratio of your nicotine shot to your shortfill helps preserve flavour, vapour production, and smoothness. When done properly, mixing nicotine shots is safe, simple, and gives you full control over your vape.

What Are Shortfills and Nicotine Shots?

A shortfill is a large bottle of e-liquid that contains no nicotine. Common sizes include 50 ml in a 60 ml bottle or 100 ml in a 120 ml bottle. The empty space is intentionally left to allow room for nicotine shots. Shortfills are especially popular with sub-ohm vapers because they usually have a high VG ratio, producing smoother inhales and larger vapour clouds.

Nicotine shots, often called nic shots, are small bottles of concentrated nicotine, usually 10 ml in size. They typically come in strengths of 18 mg or 20 mg, which are designed to dilute down once added to a larger shortfill. Nic shots are available in VG-based, PG-based, or mixed VG/PG ratios, allowing you to match them to your device and vaping style.

Why You Need Nicotine Shots for Shortfills

By default, shortfills contain zero nicotine, which means they won’t deliver the nicotine level many vapers are used to. For anyone transitioning from smoking or higher-strength e-liquids, vaping a shortfill without nicotine shots often feels unsatisfying.

Nicotine shots give you flexibility and control. Instead of buying multiple versions of the same flavour at different strengths, you can customise one shortfill to your preferred nicotine level. This approach is not only more practical, but also more cost-effective, especially for vapers who adjust their nicotine intake over time.

Step-by-Step: How to Add Nicotine Shots to a Shortfill

Step 1: Check the bottle size and capacity
Before opening anything, read the label carefully. A 50 ml shortfill in a 60 ml bottle usually allows for one nicotine shot. Larger bottles allow for more, but only up to the available space.

Step 2: Remove the nozzle carefully
Most shortfill bottles have a removable nozzle. Use a proper nozzle remover or a clean tool and apply gentle pressure. Removing it slowly helps prevent spills, as the bottle is already nearly full.

Step 3: Add the nicotine shots
Pour the nicotine shot directly into the bottle. Make sure you add the correct amount based on your target nicotine strength. Accuracy matters, guessing can result in harsh or unpleasant vaping.

Step 4: Reattach the nozzle and shake thoroughly
Once the nicotine shot is added, firmly reattach the nozzle and cap. Shake the bottle vigorously for at least 30 seconds. This ensures the nicotine distributes evenly throughout the liquid.

Step 5: Let the liquid settle
After shaking, allow the e-liquid to rest for a few minutes. This reduces air bubbles and helps prevent harsh hits on the first few puffs.

How Many Nicotine Shots Do You Need?

A common example is adding one nicotine shot to a 50 ml shortfill, which creates approximately 3 mg nicotine strength once mixed. This setup suits most sub-ohm vapers.

With larger bottles, the maths changes. For instance, adding two nicotine shots to a 100 ml shortfill usually results in a 3 mg strength, while one shot would produce a lower level. Always consider the total volume after mixing, not just the shortfill size.

Avoid adding extra nicotine “just in case.” Over-nicotining can cause throat irritation, headaches, dizziness, and muted flavour. Precision is always better than excess.

Choosing the Right Nicotine Shot (VG vs PG)

Most shortfills are high VG, so VG-based nicotine shots are the best match. They maintain the thickness of the liquid, preserve vapour production, and reduce the risk of leaking in sub-ohm tanks.

PG-based nicotine shots provide a stronger throat hit and may appeal to vapers who prefer a sharper sensation. However, adding too much PG can thin the liquid and slightly reduce vapour density.

To avoid compatibility issues, it’s worth browsing Vape Direct’s full range of nicotine shots and choosing one that matches your shortfill’s VG/PG ratio.

Common Mistakes to Avoid When Mixing Shortfills

One of the most common mistakes is adding too many nicotine shots, which overwhelms flavour and makes the liquid harsh. Another frequent issue is inadequate shaking, leaving nicotine unevenly distributed.

Poor mixing can result in inconsistent vaping, one puff may feel weak, while the next feels uncomfortably strong. Taking a little extra time to mix properly ensures smoother, more predictable results.

Safety Tips When Handling Nicotine Shots

Nicotine is highly concentrated and should be handled with care. Avoid direct skin contact by pouring carefully and washing your hands after mixing. If you mix regularly, disposable gloves can add an extra layer of protection.

Always store nicotine shots and mixed shortfills out of reach of children and pets, preferably in a locked or high cupboard. Even small amounts should be treated responsibly.

FAQs

How long should I shake a shortfill after adding a nicotine shot?
Shake the bottle firmly for at least 30 seconds. This ensures the nicotine is evenly distributed throughout the liquid and prevents harsh or inconsistent hits.

Do I need to steep my shortfill after adding nicotine shots?
In most cases, no. Shortfills are pre-steeped by the manufacturer. Letting the bottle sit for a few minutes after shaking is usually enough before vaping.

Can I add more nicotine shots later if the strength feels too low?
Only if the bottle has space. Overfilling can cause leaks and inaccurate nicotine levels. It’s best to calculate your target strength before mixing.

Is it safe to mix different brands of nicotine shots and shortfills?
Yes, as long as the VG/PG ratios are compatible and the nicotine shot is intended for vaping. Flavour quality may vary slightly, but safety is not affected.

What happens if I add too much nicotine?
Too much nicotine can make the liquid harsh and may cause dizziness, headaches, or throat irritation. If this happens, stop using the liquid and dilute it with nicotine-free e-liquid if possible.

Should I use VG or PG nicotine shots for sub-ohm vaping?
VG-based nicotine shots are usually best for sub-ohm devices. They maintain liquid thickness and vapour production while reducing the risk of leaks.

Conclusion

Using nicotine shots with shortfills is simple once you understand the process. With accurate measurements, proper mixing, and the right nicotine shot, you can customise your vape exactly to your needs without compromising flavour or performance.

Explore Vape Direct’s range of shortfills and nicotine shots to take full control of your nicotine strength and vape with confidence at every stage.