Got a question? We have the answer.

We understand all too well that you might have questions about our products and their applications. This page will help you find the answers you’re looking for. Dive into our FAQ’s below and feel free to get in touch if you have additional questions.

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Tips and tricks for optimal use of your VentiMax:

What’s allowed?

  • All food residues (cooled)
  • Leaves, peels, and residues from vegetables, fruits, and potatoes
  • Bread residues (not moldy)
  • Tea leaves and coffee grounds (drained and cooled)
  • Paper coffee filters and tea bags (drained and cooled)
  • Kitchen paper with food residues
  • Nuts, seeds, pits, grain products, rice
  • Residues from cut flowers and indoor plants (without soil clumps)

What’s not allowed?

  • Liquids (sauce, soup, milk, …)
  • Hot (food) residues (let them cool first)
  • Oils and fats
  • Mussel shells, shellfish, bones
  • Cat litter and birdcage sand
  • Animal feces or hair
  • Ash residues, charcoal

How to replace a bag?

To replace a bag, follow these steps:

  1. Replace your bag in a timely manner, maximum after 4 days.
  2. Shake the new bag sufficiently loose.
  3. Attach the bag under the handles to prevent it from falling into your bucket when it fills up.


  • Replace your bag timely to prevent unpleasant odors.
  • Shake the new bag well before placing it.
  • Attach the bag under the handles to prevent spills.

Follow these simple tips and enjoy efficient use of your VentiMax, making waste disposal effortless and environmentally friendly.

That depends entirely on how intensely you use it. Typically, a modal family changes the bag 2-3 times a week. Because it has become full. If there hasn’t been an abundance of moisture in it and the ventilation around the VentiMax® is sufficient, it’s fine to hang around a bit longer.

The CompostBag® bags are OK compost HOME certified. They are therefore allowed in industrial composting, where they are fully absorbed into the biomass after 2 to 3 weeks. It is best to check with the municipality or the intermunicipal organisation that organises VGF waste collection.

The bags can also be put in the compost bin without any problem, although there they will take a little longer to disappear. Unlike industrial composting, home composting is very dependent on weather conditions (mainly humidity and temperature).

CompostBag bags are not perishable like food. But they are susceptible to ‘ageing’, the gradual deterioration of mechanical strength properties. Therefore, it is recommended to consume the bags within 12 months of the production date printed on the bags.

The bags are best stored at room temperature (20-23°C), moderate relative humidity (50-55%) and away from direct sunlight. An ideal place in under the kitchen sink.

If bags start tearing prematurely, this usually indicates dehydration. Rub such a bag with a damp cloth or fan it through a steam cloud just before use, and the bag will regain its former strength after some time. However, the bag should then be used immediately.

You can find the date in the fold of the bag (see picture). Each bag basically has a production date, this is printed every 35cm on the bags.

For You

Becoming a partner with us is simple. Get in touch with us through our contact page or by mail, and let’s start a conversation about how we can collaborate. Additionally, we have a specially designed “For You” page where you can explore opportunities tailored to recognize and empower our partners. We look forward to connecting with you and exploring the possibilities of partnership together. Let’s create something exceptional.


On our shop page you can choose which webshop suits you best. Households looking for products for personal use? We’ve got you covered with our Household Webshop.

You can easily place your products in your shopping basket by clicking on ‘Add to basket’ in the webshop overview. With an account on our website, ordering is even faster. Don’t have an account? No worries. You can also order without an account or create one on the spot. Piece of cake!

On our shop page you can choose which webshop suits you best. Are you a professional and in need of an invoice? Our Professional Webshop is the place for you.

You can easily place your products in your shopping basket by clicking on ‘Add to basket’ in the webshop overview. In our professional webshop, it is compulsory to create an account when placing an order. Be sure to have your company number/tax number ready, as we need this number to complete your account and process your order.

Our Payment Methods:

  • KBC / CBC
  • Belfius Direct Net
  • Creditcard
  • iDeal
  • Bancontact

As a business you can also transfer the amount to our bank account number:

  • BE06 4320 0218 0122

Made a mistake? Can happen! Contact us as soon as possible and be sure not to forget your order number. If your order has not been shipped yet, we can change it in most cases, otherwise we will cancel the order and ask you to place a new order. If your parcel is already on its way or you have already received it, please send us an e-mail or contact us. We will then look together for a suitable solution.

Please let us know as soon as possible, so we can cancel the order for you. Please note: this is only possible if your order has not yet left our warehouse. If your parcel is already on its way or you have already received it, please send us an e-mail. We will then look together for a suitable solution.

We carefully do our best to deliver the order to you as soon as possible. Orders are dispatched within 2-4 working days. Should we not meet the normal delivery time for any reason, we will of course inform you as soon as possible.

The Compost Bag Company works with the local postal service (BPOST). Moreover, we pack as many products as possible in envelopes because they fit in the letterbox, are delivered together (and quickly) with other mail and require less packaging material. For larger parcels, we cooperate with the courier service DPD.

When you have placed an order and it has been sent with DPD, you will receive an email in your mailbox with a tracking code. If it has been sent with BPOST (small packages) you will not receive a tracking code.

Ordering in Belgium: fixed rate of €4 when purchasing only 1 item (excluding VentiMax®) & after that a fixed rate of €7.

There is no shipping cost for orders that cost €24 or more.

Bags bought through this online shop have a limited shelf life and therefore cannot be returned. The right of withdrawal therefore does not apply. The sale is thus final after successful payment.

The VentiMax® Welcome Pack can be returned within 14 days IF the pack is still complete (including Refill Rolls, magnet and manual) and the VentiMax® is not assembled. The cost of the return will be paid by the buyer. Once we receive the return shipment, the amount (excluding shipping costs) will be refunded.

If there is something wrong with your order, a part of the order is missing or you have received the wrong product, please contact us as soon as possible so we can look for a solution together.

You can always find a production date on our products. The guarantee that the product retains its quality runs for 1 year after this production date. After that, the strong properties decrease because the products start to degrade. This can lead to the bags tearing.

Having problems with your bags and the production date is quite recent? Then contact us and together we will look for a suitable solution.

Items can be accepted for return (within 14 calendar days) if the band (wrapper) is not torn and the box is complete, all rolls of the item must be present for a complete refund. Our compostable products have a limited shelf life due to their degradable nature. Products older than one year from the production date* cannot be returned.

If there is something wrong with your order, if part of your order is missing or if you have received the wrong product, please contact us as soon as possible so that we can look for a solution together.

*You can always find a production date on our products. The guarantee that the product retains its quality lasts for one year after this production date. Subsequently, the strong properties decrease because the products start to degrade. This may cause the bags to tear. Do you have problems with your bags and is the production date quite recent? Then contact us and together we will find a suitable solution.


BioPlastic represents a groundbreaking innovation in the world of sustainable packaging. Derived from renewable biological sources like plants, BioPlastic offers a compelling solution to the environmental challenges posed by traditional plastics.

Crafted with precision and care, BioPlastic boasts all the functionalities of conventional plastics while embodying a commitment to sustainability. Its eco-friendly composition ensures minimal impact on our planet, making it a responsible choice for businesses and consumers alike.

From durable packaging materials to disposable utensils and beyond, BioPlastic offers versatility without compromise. Join the movement towards a green future with BioPlastic – where sustainability meets innovation, one package at a time.

Composting is not merely a process; it’s a transformative journey towards a sustainable lifestyle. Picture this: your food scraps, yard waste, and organic materials undergo a magical metamorphosis, turning into nutrient-rich soil for your garden or plants.

But composting is more than just recycling organic waste – it’s a testament to our commitment to the planet. By diverting waste from landfills and reducing greenhouse gas emissions, composting empowers us to make a tangible difference in our environment.

Join the composting revolution and embark on a journey of discovery. Experience the satisfaction of nurturing your garden with nature’s own fertilizer. Embrace the beauty of composting and cultivate a sustainable future for generations to come.

The terms “biobased” and “renewable” are often used interchangeably, but they do have distinct meanings.

Biobased materials are derived from renewable biological resources, such as plants, animals, microorganisms, or their byproducts. These materials are carbon-based and find applications in various sectors like biofuels, bioplastics, and biochemicals. However, the term ‘biobased’ solely denotes the origin of the material, without specifying its environmental impact or sustainability.

On the other hand, renewable resources encompass a broader category, including not only biobased materials but also energy sources like solar, wind, hydropower, biomass, and geothermal energy. Renewable resources are naturally replenished over time, making them inherently sustainable options for meeting our energy and material needs.

While biobased materials are a subset of renewable resources, it’s essential to recognize that not all renewable resources are biobased. For example, solar and wind energy are renewable but not derived from biological sources.

In summary, while biobased materials originate from renewable biological resources, renewable resources encompass a wider range of naturally replenished materials and energy sources. Both play crucial roles in building a sustainable future, but their environmental impacts and applications may differ.

But what’s the difference between compostable and biodegradable? Here’s the scoop:

Compostable: Turns into nutrient-rich compost in specific composting conditions, contributing to soil health and plant growth.

Biodegradable: Naturally breaks down over time in various environments, including soil and water, thanks to microbial action.

Both options are great for the planet, but compostable bags offer the added benefit of creating valuable compost. Choose the eco-friendly solution that suits your needs and helps make a positive impact on our environment!

As The Compost Bag Company, we want to assure our customers that our Mater-Bi® products are manufactured without the intentional use of latex, gluten, or any substances known to be allergens as outlined in Annex II of European Regulation 1169/2011 and its amendments. However, it’s important to note that our Mater-Bi® grades have not undergone specific testing to verify the unintentional presence of these substances.

Furthermore, we want to emphasize that the starch contained in our Mater-Bi® grades, when applicable, is derived from corn starch. This corn starch is selected specifically for its compatibility with a “gluten-free” dietary regimen, catering to the needs of individuals who are allergic or intolerant to gluten.

It’s essential to understand that while our products are designed with consideration for gluten intolerance, our production plants are not certified as “gluten-free.” This is because our facilities are primarily dedicated to the production of plastics and other chemical products, rather than food items. As a result, they are not subject to “gluten-free” certification processes.

Dog waste poses significant health and environmental risks that many people underestimate. It contains millions of bacteria and parasites, including E. Coli, Salmonella, and various worms, which can lead to illnesses in humans such as gastrointestinal issues and skin infections.

The EPA categorizes pet waste as a nonpoint source pollutant, alongside toxic chemicals and pesticides, highlighting its environmental impact. Dog waste can contaminate water sources, contribute to algae overgrowth, and even pollute the air, as shown by studies linking airborne bacteria to dog feces.

Additionally, it serves as a food source for rodents, potentially exacerbating rodent problems and further health hazards. Proper disposal of dog waste is crucial to mitigate these risks and protect both human health and the environment.

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