Aluminium screw cap 18 mm

Screw cap made of aluminium
Colour: gold
With rubber seal
The inside of the cap is red.
This screw cap fits glass tubes with a diameter
of 18mm: lengths 50mm 75mm 145mm 180mm
and 19mm: length 200mm

Aluminium screw cap 18 mm – Gold with rubber seal, leak-proof and elegant

This gold aluminium screw cap is a high-end finishing accessory, specially designed for glass tubes with a diameter of 18 to 19 mm. It combines a refined look, excellent leak-tightness thanks to its internal rubber seal, and perfect compatibility with several standard tube models.

Made of aluminium, this cap is lightweight, corrosion-resistant and easy to handle. It has a red interior, which creates a subtle but elegant aesthetic contrast. It is an ideal choice for professionals in fine food, cosmetics, sensory kits or gift boxes who want to offer a high-quality finish for their glass tubes.

A high-end screw cap for your glass tubes

Designed to fit 18 mm diameter tubes precisely, this screw cap is recommended for several tube lengths: 50 mm, 75 mm, 145 mm, 180 mm – as well as tubes with a 19 mm diameter and a length of 200 mm. It provides a perfect, airtight and durable closure, while enhancing the overall look of the product.

With its understated satin gold design, it fits easily into refined, artisanal or contemporary settings. It is a cap that instantly enhances the container and its contents, whatever its intended use.

Recommended applications

• Food tubes: spices, teas, flavoured salts, dried herbs, culinary blends.
• Natural cosmetics: vegetable oils, powders, skincare beads, bath salts.
• Wellness products: botanical extracts, herbal blends, micro-granules, infusions.
• Sensory kits: aromas, pigments, scented or visual powders.
• Samples or discovery boxes: refined presentation of several products in tubes.
• Handcrafted decoration: glitter, beads, coloured sand, natural elements.

The advantages of the 18 mm aluminium screw cap

• Elegant finish: satin gold aluminium, perfect for high-end products or gifts.
• Leak-proof closure: an internal rubber seal guarantees excellent tightness.
• Wide compatibility: suitable for glass tubes with a diameter of 18 mm and 19 mm (see compatible lengths below).
• Red interior: an original, subtle finish to set your product apart.
• Reusable and durable: sturdy, recyclable, and resistant to moisture or temperature changes.

Technical specifications

A high-end solution for your gift boxes and displays

This cap is particularly well suited to multi-tube gift boxes presented on a wooden base or in a tasting box. Its gold finish instantly enhances the product, adding high perceived value. It can also be combined with careful labelling or tube personalisation for a complete customer experience.

It is an ideal choice for craftspeople, local producers, organic brands or specialist shops wishing to break away from the norm by offering high-quality, distinctive packaging.

Why choose an aluminium cap with a seal?

Unlike plastic caps or basic caps without a seal, this aluminium screw cap guarantees:

• An airtight closure thanks to its rubber seal – ideal for protecting aromas, oils, powders or sensitive contents.
• A longer service life – aluminium is sturdier than plastic and more stable over time.
• A premium feel – metal feels higher in quality when handled.
• A strong visual impact – the cap becomes a real design asset for the container.

A recyclable and reusable cap

Aluminium is a 100% recyclable material, with no loss of quality. This cap can therefore be easily reused or recycled, fitting perfectly into a sustainable development approach.

It is also resistant to moisture and temperature changes, making it suitable for food, cosmetic or natural products. In addition, it is easy to look after and can be used several times without any loss of its sealing properties.

Compatibility with your Bolium glass tubes

This cap is compatible with many of the tube models available on our site:

• Glass tubes ø 18 mm: 50 mm, 75 mm, 145 mm, 180 mm
• Glass tubes ø 19 mm: 200 mm

It fits all tubes with a screw thread matching these diameters. It is recommended for wide-mouthed containers with a flat or round bottom, and can be fitted in a few seconds without tools.

Enhance your products with a high-end finish

Choosing a cap may seem trivial, but it strongly influences the perceived quality of the final product. This satin gold cap is the obvious choice for any brand that cares about its image, its storytelling or its product presentation.

Whether used in a shop, on a stand or in a box, it becomes a visual and functional asset, while meeting the sealing and durability standards required by professionals.

A premium cap for exceptional containers

The 18 mm aluminium screw cap with rubber seal is the ideal solution for closing your glass tubes elegantly and reliably. Its gold finish, flawless seal, sturdiness and compatibility make it an essential accessory for showcasing your creations.

It is a wise choice for brands seeking distinction, demanding craftspeople, or professionals wishing to offer very high-quality finished products.

A small cap, but a big impact on how your product is perceived.