PureLock by MTPak Coffee is our line of hermetic green coffee packaging.

PureLock®
by MTPak Coffee

Protecting the flavour and quality of specialty green coffee

Engineered for Specialty Coffee

PureLock by MTPak Coffee is our new range of green coffee bags. Unlike competitor products, PureLock bags are specifically engineered for specialty coffee, with multilayer high-barrier packaging that maximises the freshness and retains the delicate flavour notes of your coffee.

PureLock bags are made from high-strength recyclable polyethylene. This means they offer leading protection against external contaminants such as light, moisture, and temperature fluctuations, making sure that your green coffee stays fresh from farm to roaster.

PureLock by MTPak are recyclable hermetic green coffee bags.

Meet the 2025 finalists of the Producer of the Year

This competition celebrates the most innovative, impactful, and sustainable coffee producers around the world – powered by PureLock.

ldpe recyclable 4 symbol hermetic green coffee bags MTPak Coffee

Eco-friendly materials

PureLock bags are manufactured with multiple layers of eco-friendly packaging materials such as high strength polyethylene. That means they're both reusable and recyclable, minimising your impact on the environment.

custom purelock hermetic green coffee bags MTPak Coffee

Completely customisable

PureLock green coffee bags can be customised to showcase essential information, such as origin, processing methods, and harvesting dates.

packaging made for green coffee hermetic green coffee bags MTPak Coffee

Made for specialty green coffee

Our PureLock green coffee bags are engineered especially for specialty-grade green coffee - rather than being a generic commodity agricultural bag.

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Designed with coffee farmers in mind

There are several key factors that must be controlled during storage to retain the overall quality of green coffee. Moisture content, for example, is key, with target levels for green coffee between 8 and 12.5%. Water activity, however, is equally important for buyers – and is typically measured on a scale from 0.0 to 1.0 aW. 

Green coffee should have a water activity level of around 0.4 to 0.6 aW. Between 0.6 and 0.9 aW, the chance of microbial activity increases, which can lead to the development of mould and fungus in the beans. Additionally, moisture migration between green coffee and the atmosphere is a major cause of quality deterioration. This can lead to the coffee taking on “baggy”, “cereal”, or otherwise stale off-flavours typically associated with past crop.

PureLock multilayer hermetic packaging for green coffee caters to all the requirements that come with storing and transporting your product:

Maintains moisture content

Highly resistant to oils and solvents

Protects quality and inherent flavour and aroma characteristics

Custom and stock options available

Increases shelf life

Easy distribution with various packaging sizes

Certified sustainable materials

Food Grade Packaging Compliant

Sustainability Certifications

PureLock® bags are fully reusable and recyclable. Our certifications include:

ldpe recyclable 4 symbol hermetic green coffee bags MTPak Coffee
iso 9001 certified hermetic green coffee bags MTPak Coffee
fda approved coffee packaging mtpak hermetic green coffee bags MTPak Coffee
food safe green coffee bags mtpak hermetic green coffee bags MTPak Coffee

EU10/2011 Phthalates Content with the EN 14372:2004

Our products

Size: 100g / 3.5oz

Dimensions: 120mm x 200mm x 80mm

Materials: Multilayer PE with Barrier Layer

Closing mechanisms: Airtight single-track zipper

Size:

  • 30kg / 66lbs
  • 69kg / 152lbs

Dimensions:

  • 650mm x 800mm
  • 750mm x 1300mm

Size: 70kg / 154lbs

Dimensions: 680mm x 980mm

Materials: Burlap/jute 

Design: Stock and custom-printed

Materials: Recyclable cardboard

Sizes: 10kg and 20kg

Design: Stock and custom-printed

Discover our PureLock green coffee bags

Learn more about our hermetic  green coffee packaging with Roosa Jalonen, 2024 UK Barista Champion.

Have more questions?

Frequently asked questions

Hermetic packaging is a type of advanced packaging that ensures the contents inside are airtight. It also offers high barrier protection against external elements, such as oxygen, air, and other gases.

Yes, all PureLock green coffee bags are food grade and fully compliant with USFDA and EU Regulations. Our certifications can be shared on request, or you can check them out for yourself.

Our green coffee bags have multiple layers of high barrier packaging that will keep your coffee fresh in all atmospheric conditions without the help of pesticides or insecticides for more than a year.

The ballooning effect occurs when air is trapped inside the bags during the filling and sealing process. This air can create internal pressure during transit, which, if not managed properly, may lead to the bag bursting.

Remove as much air as possible before sealing the bags to ensure the safety and integrity of your product during transportation.

If packed and preserved properly, PureLock bags can preserve green coffee for more than one year.

With cable ties or heat sealing.

Yes, with the help of a heat sealing machine of the correct width.

Yes, but this is not mandatory.

Contact our distributors in your country or email account@mtpak.com. Our Contact Us page has all the information you need.

We aim to give our clients the best delivery experience possible. For our lower MOQ options, DHL delivers in 10 to 15 days. For higher quantities, delivery can take approximately 15 days. The team representative assigned to you will be in touch throughout the entire process.

If you are interested in becoming an MTPak distributor, you can complete the form here and select “Become a Distributor” on the dropdown.

Our distributors benefit from access to international markets, technical expertise, 24/7 support, speedy delivery, and massive room for growth.

If stored properly, PureLock bags can be used up to 3 times.

Chat with our team to develop seamless solutions to maintain excellence at every stage of the process.

Contact our team to get more details about PureLock® packaging options and a free quote.

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