Colored rubber (BIIR) plugs/rubber caps for medical bottle

Colored BIIR rubber caps for medical bottle closures can help distinguish component variants while the molded profile fits the intended container. A cap covers a defined external region, whereas an inserted plug engages the bottle opening. Each configuration needs its own dimensions even when the color is shared.

Keep the identification scheme linked to the complete part. The visible head or cap color should correspond to the selected formulation, size, and bottle position rather than serve as the only replacement criterion. Establish how the component seats and how any retaining hardware acts on it after the bottle is closed.

The BIIR formulation and color configuration should be assessed for the contents and processing sequence used with the medical bottle. Maintain the required cleanliness around the contact surfaces before assembly. Inspect the finished closure position rather than judging the rubber while it is loosely placed on the container. When a bottle design or closing method changes, consider the effect on the cap or plug interface and preserve the correct variant identity throughout the assembly process.

Material options

Rubber compound options, customized alongside the profile and contact conditions.

Hardness selection

Solid rubber options: 30–90 Shore A. A cap covers a defined external region, whereas an inserted plug engages the bottle opening.

Custom geometry

Each configuration needs its own dimensions even when the color is shared.

Fit evaluation

Keep the identification scheme linked to the complete part.

Color & OEM

Custom colors; OEM identification positioned outside closure contact surfaces.

Photos illustrate structure or material appearance only. A cap covers a defined external region, whereas an inserted plug engages the bottle opening. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.