inner plug and outer cap

The inner plug and outer cap are components that work together to seal and protect a perfume bottle’s sprayer or dispenser. The inner plug typically sits inside the bottle neck to prevent leakage, while the outer cap provides a decorative and protective cover. When specifying these parts, consider their compatibility with the bottle’s neck finish and the chosen sprayer or pump. Material, color, and finish options should align with the overall packaging design. Physical samples are necessary to verify fit, sealing effectiveness, and ease of assembly before bulk ordering.