Screw Caps: How to Choose the Right Closure for Your Bottles

When choosing a bottle for oil, vinegar, sauce or any other liquid product, the closure is often the last detail people think about. Yet it is one of the most important elements: the wrong cap can cause leaks, compromise product preservation or simply make it uncomfortable for the end customer to use.

 

In this guide we help you navigate the different types of screw caps available, from standard versions to those with integrated pourers, so you can find the right closure for your product.

What Makes a Good Screw Cap

A good screw cap needs to do three things well: create a hermetic seal, fit the bottle diameter correctly and provide a smooth experience for the customer.

A fourth requirement is often added to these: communicating the product's identity through colour and finish.

 

The most widely used material is polypropylene, lightweight, chemical-resistant and suitable for contact with food and beverages. The thread must be compatible with that of the bottle: a 28mm cap does not fit a 31.5mm bottle, so before choosing it is essential to verify the technical specifications of the bottle you intend to use.

Standard Caps: Simple, Reliable and Versatile

Standard screw caps are the most common choice for bottles of oil, vinegar, sauces and liquid products in general. They are available in different sizes to fit the most common bottle necks.

 

The 24mm Heavy Milled Black Cap has a milled finish with lateral grooves that make gripping and closing easier, and is available in black. It is a strong choice for anyone who wants a cap with a premium and modern look, suited to flavoured oils, quality vinegars or gourmet sauces.

 

The 31.5mm Plastic Screw Cap is the standard size for the most widely used oil and vinegar bottles. It is available in a simple version, practical and compatible with the majority of table bottles.

Caps with Pourers: For More Comfortable and Precise Use

When a product needs to be dosed with precision, as is the case with oils, vinegars, sauces and condiments, a cap fitted with a pourer is a choice that significantly improves the user experience.

 

The 31.5mm Plastic Screw Cap with Pourer integrates a dosing spout directly into the cap, allowing the product to be poured in a controlled way, without splashing and without waste. It is the preferred choice for flavoured oils, balsamic vinegars and condiment sauces.

 

For those who want an even more premium solution, the 31.5mm S/Steel Pourer with Screw Cap offers the same functionality with a stainless steel finish that communicates quality and durability. It is particularly suited to extra virgin olive oils, fine vinegars and high-end products where presentation is part of the value.

Tamper Evident Caps: Security and Trust at First Use

For products destined for retail sale, particularly food products, adding a visible security system is often both a strategic and practical choice. The 24mm Plastic Tamper Evident Cap is designed to clearly show whether the bottle has been opened before purchase, thanks to a security band that breaks at first use.

 

It works exactly like the tamper evident system on food jars: it tells the customer that the product is intact and has not been tampered with, increasing trust in both the brand and the point of sale.

Tethered Caps: The Response to European Regulations

Since 2024, the European SUP (Single Use Plastics) regulation requires that caps on plastic bottles remain attached to the container after opening, to reduce the dispersal of plastic into the environment. The 38mm White Tethered Plastic Cap meets exactly this requirement: the cap remains connected to the bottle neck even after opening, without detaching.

 

For anyone producing drinks in PET bottles or other plastic-packaged products, verifying compliance with the SUP regulation is a mandatory step before choosing a closure.

Cap Colour: A Detail That Communicates

Black is elegant and modern, pairing well with gourmet and premium products. White is neutral and clean, communicating simplicity and freshness. The choice of cap colour should be consistent with the label, the colour of the bottle and the image you want to convey to the customer.

Looking for the right cap for your bottles?

Explore our range of screw caps, pourers and tamper evident closures for oils, vinegars, sauces and more.

Browse All Screw Caps

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