The refillable pod kit (also known as the open pod kit) has gained popularity among users for its refillable design and high flexibility. But its appeal goes beyond that: you can experiment with different flavors, even from different e-liquid brands, making every refill a personalized creation that helps you discover your own unique taste. However, many users tend to overlook small details during use, which can affect flavor or even lead to leakage. This guide will walk you through the correct way to refill SP2S refillable pod kits, share practical tips, and explain the principles behind them—so you can enjoy a smooth and pure vaping experience.

Advantages of Refillable Pod Systems

The biggest highlight of a refillable pod system is the freedom and flexibility it provides. Beyond being able to freely mix and match different e-liquid flavors and explore new combinations, the pod structure and coil design ensure that the cotton remains fully saturated, helping to maintain stable flavor. At the same time, controlled refilling and airflow design reduce the risk of leakage. Since the pods can be refilled multiple times, they last longer, help save costs, and reduce waste. This open design not only offers a flexible user experience but also balances flavor performance with safety.

How to Refill a Refillable Pod Kit Correctly

Refilling an open pod may seem simple, but if done incorrectly, it can cause e-liquid leakage, poor cotton saturation, or a decline in flavor quality. Proper operation is not just about following steps—it ensures that the e-liquid’s flavor is fully released:

1. Tilt the pod at 45°

This angle takes advantage of the pod’s internal airflow design, allowing air to escape smoothly and preventing pressure imbalance. If the pod is placed flat or tilted insufficiently, trapped air can force e-liquid out of the chamber and cause leakage.

2. Refill slowly

Gently inject e-liquid along the side of the chamber instead of adding too much at once. Refilling too quickly may prevent the cotton from saturating properly, creating air bubbles or localized dry burns that lead to leakage or burnt taste.

3. Seal the silicone plug

After refilling, make sure the silicone plug is closed tightly to avoid leakage when carrying or storing the device.

Each correct refill is like a small creation—allowing the e-liquid to fully release in every puff, delivering the smoothest and purest flavor.

E-Liquid Choice and Filling Amount

Choosing the right e-liquid and controlling the fill amount are equally important:

• E-liquid choice: The PG/VG ratio directly affects flavor and vapor. Higher VG offers smoother draws and denser vapor, while higher PG delivers a stronger throat hit and more pronounced flavor. Selecting the ratio that suits you best allows the refillable pod kit to perform at its full potential.
• Filling amount: Do not overfill the chamber. Leaving some space ensures smooth airflow, prevents pressure issues that cause leakage, and allows the cotton to absorb the liquid evenly for a more stable flavor.

Tips for Using Open Pod Kits

Optimal refill times: 3
Based on SP2S testing, each pod can maintain optimal flavor quality within three refills. This balance is grounded in coil lifespan and cotton saturation—ensuring consistent flavor while maximizing pod usage. Beyond this, cotton saturation decreases, flavor dulls, and leakage risk increases.

Usage cycle
Within the three-refill limit, it is recommended to use the pod within one day (or two at most). For pods that exceed the optimal refill cycle, it is best to finish them within a day to avoid flavor decline or leakage.

Why Does Leakage Happen?

Leakage issues have clear scientific causes:

• Air pressure imbalance: Incorrect refilling or improper placement of the pod can trap air, and pressure changes may push out e-liquid. Tilting the pod at 45° helps air escape through the airflow system and prevents leakage.
• Insufficient cotton saturation: When the cotton isn’t fully soaked, dry burns or partial leakage can occur.
• Overfilling: Filling the pod to the brim leaves no buffer space, disrupting airflow and causing seepage.

Understanding these principles makes each refilling step more purposeful and professional.

Conclusion

The greatest advantage of refillable pod kits lies in their freedom and flexibility, while also enabling users to explore and customize flavors. By following the correct refilling steps, applying small tips, and understanding the science behind them, you can maintain stable performance, prevent leakage, and enjoy a consistently smooth and pure experience.

SP2S refillable pod systems are designed not only to provide flexible and convenient use but also to ensure, through advanced pod structure and refilling methods, that every session becomes an opportunity to create your own personal flavor experience.