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Estersteam is an innovation from FFP that makes microwave cooking simple, consistent, convenient and presents perfectly cooked meals time after time.

The Estersteam valve turns a tray/lid combination, pillow pack or stand-up pouch into a microwaveable container. There is no need for the consumer to pierce the packaging as the valve peels back under heat and pressure in the microwave, allowing a controlled release of the steam for a perfect cooking result. The Estersteam valve shrinks linearly on heating to avoid re-sealing and therefore eliminates the risk of the pack imploding on cooling.

Film can be supplied clear, white or reverse printed in full colour. Ink is sandwiched in the laminate structure to protect machinery and prevent food contamination. The Estersteam valve is applied by FFP during the production process and the film will then run as registered film at the same speed as your usual registered film with no need for modifications to your packing line and no capital investment.

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All of our products / materials are made to order, therefore minimum order quantities apply.


High barrier versions available
Consistent cooking results
Freezer or fridge direct to oven
Keeps the oven clean
Aids portion control
Variety of pack formats
Moisture retention
Tailored steam release


Estersteam is available on the reel, as pre-made bags or stand up pouches and can also be offered with barrier.

On the Reel

Estersteam valves are pre-applied and supplied on the reel at your specified repeat length, weld or peel-seal. Ideal for pillow packs and lidding film.

Pre-made Bags

Estersteam pre-made bags can be supplied in a variety of formats and sizes, with the option of being fully printed or plain. They can be easily heat-sealed once filled.

Stand-up Pouches

Estersteam stand up pouches provide dynamic shelf appeal adding value through full-face branding, efficient use of shelf space and ease of use throughout the supply chain.

Testing and Compliance

Estercook is fully tested and verified to conform to food safety standards. With more than 30 years’ experience in high temperature applications, we have a proven route to a rigorous approval process for all of our packaging.

Everything we manufacture must comply with the Food Contact Framework Regulation (EC) 1935:2004. All of our Materials, inks & adhesives conform to all current European food contact legislation for use as a dual-ovenable direct food contact material.

High temperature packaging is subjected to additional testing and two initial types of tests are undertaken: Specific Migration Limit (SML) tests, which test specific materials in migration, and Overall Migration Limit (OML), which tests the completed laminate. All tests are conducted at high temperatures providing a ‘worst case’ for both migration and chemical decomposition products.

Only when all testing is complete is a structure approved for use in your packaging.


Microwaveable pouches and pre-made bags can provide significant lightweighting opportunities which in turn can see a substantial reduction in volume of packaging and in turn carbon emissions. Many ready-meals currently on the market are presented in a tray, with a film lid and cardboard sleeve. By replacing this with a microwaveable pouch or pre-made bag, it is estimated that a weight saving of 83% can be achieved.

FFP can also provide a mono material PP (Polypropylene) laminate called ‘FFPP’ that can be recycled by returning to store with carrier bags. This material is also suitable in some instances for microwaveable applications.

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Ready Meals
Food to go

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All of our products / materials are made to order, therefore minimum order quantities apply.

Standard Disclaimer

This Declaration of Compliance describes the status of the product(s) specified under General Product Information. The user of the product (or downstream user, if applicable) is responsible for ensuring that the finished food package complies with applicable migration limits in the food itself under actual conditions of use. Furthermore, the food packer is responsible for verifying possible interactions of the product(s) or its components with the foodstuffs (e.g. modification of odour, taste, consistency, migration etc.) which are to be checked prior to use and in function of the end-uses. This declaration replaces all previous declarations for the same specification/ product. It remains valid until a change in the legislation or new scientific information changes the legal status.