We provide customized inner plug and dropper tube solutions tailored to specific fluid properties.
For High-Viscosity Liquids: We increase the inner diameter of the dropper tube and optimize the rebound resilience of the rubber bulb to ensure smooth and effortless dispensing.
For Low-Viscosity & Volatile Liquids (e.g., Essential Oils): We utilize extended-length sealing plugs combined with tighter thread tolerances to maximize airtightness and prevent evaporation.
Furthermore, prior to shipment, every batch undergoes rigorous inverted leakage testing and vacuum negative pressure testing. These protocols simulate extreme transportation conditions to guarantee a "Zero-Leak" performance standard.