Nicotine shots, also known as nic shots, are small bottles of concentrated nicotine liquid that are used to increase the nicotine strength of nicotine-free e-liquids. They are commonly used in conjunction with short fill e-liquid bottles to create a desired nicotine concentration.

Here are some key points about nicotine shots:

1. Nicotine strength: Nicotine shots typically come in various nicotine strengths, such as 18mg/ml or 20mg/ml. It's important to choose the strength that suits your preferred nicotine level and tolerance. Higher strengths may be suitable for heavy smokers transitioning to vaping, while lower strengths may be preferred by vapers gradually reducing their nicotine intake.

2. Packaging and size: Nicotine shots usually come in 10ml bottles, which is the maximum size allowed for nicotine-containing e-liquids under TPD regulations in certain regions. The bottles typically have child-resistant caps and may have warnings about the dangers of nicotine and the need to handle them with caution.

3. Mixing with short fills: Nicotine shots are added to short fill e-liquid bottles to create a complete e-liquid with the desired nicotine strength. The short fill bottle is partially filled with nicotine-free e-liquid, leaving space for the nicotine shot(s). Once the nicotine shot(s) is added, the bottle is shaken thoroughly to ensure proper mixing.

4. Safety precautions: It's crucial to handle nicotine shots with care and follow safety recommendations. Nicotine is a toxic substance, and direct exposure or ingestion can be harmful. It's advisable to wear gloves and eye protection when handling nicotine shots and to store them safely, away from children and pets.

5. Mixing calculations: When adding nicotine shots to a short fill bottle, it's important to calculate the nicotine strength you want to achieve. For example, if you have a 50ml short fill bottle and are using a 10ml, 18mg/ml nicotine shot, adding the entire nicotine shot will result in a final nicotine strength of approximately 3mg/ml.

Always refer to the instructions provided by the nicotine shot manufacturer and the e-liquid brand when mixing e-liquids. It's recommended to thoroughly shake the bottle after adding the nicotine shot and allow it to steep for a short period to ensure proper blending of flavors before vaping.