Where to Buy Compostable Food Waste Bags in the UK
- Biofuture
- 2 days ago
- 6 min read
If you use a kitchen food waste caddy, choosing the right liners makes everyday food recycling much easier. Compostable food waste bags help keep caddies cleaner, reduce odours, and make it simpler to transfer food scraps into your outside collection bin.
With more households across the UK now separating food waste, there are more options available than ever, but not all bags labelled as "eco-friendly" are suitable for food waste collections.
The best compostable food waste bags should be certified for composting, fit your caddy correctly, and be strong enough to handle wet food waste without splitting or leaking.
This guide explains where to buy compostable food waste bags, what to look for when choosing them, and how to make sure you select liners that work with your food waste collection.
Where Can You Buy Compostable Food Waste Bags?
There are several places where you can buy compostable food waste bags in the UK, including specialist suppliers, supermarkets and online marketplaces.
However, the quality and suitability of liners can vary. Before buying, it’s worth checking that the bags are genuinely compostable and meet the requirements for food waste collections.
Specialist compostable packaging suppliers
Specialist suppliers are often the best option if you want clear information about certification, materials and sizing.
Unlike general-purpose bin liners, compostable food waste bags from specialist suppliers are designed specifically for food caddies and waste collection systems.
At Biofuture, our compostable food waste liners are:
EN 13432 certified compostable
Designed for food waste collections
Available in sizes suitable for kitchen and outdoor food waste caddies
Made without conventional plastic
Available in cost-effective bulk packs
Buying directly from a specialist supplier also makes it easier to understand exactly what you are purchasing, rather than relying on vague environmental claims.
Supermarkets and online marketplaces
Compostable food waste bags are also available from some supermarkets and online marketplaces.
These can be convenient, but it is important to check the product details carefully. Some bags may be marketed as biodegradable or environmentally friendly without being suitable for food waste collections.
Before purchasing, look for:
EN 13432 certification
Clear compostability information
The correct liner size for your caddy
Confirmation that the bags are suitable for food waste
A lower upfront price does not always mean better value if bags are too small, tear easily, or are not accepted for your local collection system.
Council-provided food waste bags
Some councils provide replacement food waste liners free of charge or offer collection points where residents can pick them up.
However, availability varies significantly depending on your local authority. If you are specifically looking for free replacement liners, our guide on how to get more food waste bags explains how council schemes work and what options are available.
What Should You Look For When Buying Compostable Food Waste Bags?
Not all compostable bags are the same. Before buying, there are several important things to consider.
Certified Compostable, Not Just Biodegradable
One of the biggest differences between food waste bags is whether they are genuinely compostable.
The terms compostable and biodegradable are often used interchangeably, but they mean different things.
Biodegradable materials can break down over time, but there is no guarantee of how quickly they will decompose or what conditions are required.
Certified compostable bags are tested against recognised standards, such as EN 13432, which confirms they can break down under industrial composting conditions.
For food waste collections, choosing certified compostable liners helps ensure they are accepted by waste processing facilities and reduces the risk of contamination.
The Correct Size for Your Food Waste Caddy
Choosing the right size liner is essential. A bag that is too small may not sit securely around the caddy edge, while an oversized liner can create unnecessary waste and make handling more awkward.
Most UK households use one of three common sizes:
6L food waste bags – designed for smaller indoor kitchen caddies
10L food waste bags – designed for standard indoor kitchen caddies
30L food waste bags – designed for larger outdoor food waste bins
Before buying, check the capacity of your caddy rather than relying only on appearance. A correctly sized liner will sit neatly inside the container and make tying and removing bags easier.
Strong, Leak-Resistant Bags That Can Handle Food Waste
Food waste contains moisture, which means a good liner needs to do more than simply hold dry waste.
Low-quality bags can tear when they become wet, especially with food scraps such as fruit peels, leftovers, coffee grounds, and cooked food.
Look for compostable food waste bags that offer:
Strong seams to prevent splitting
Leak resistance for wet food waste
A suitable thickness for everyday use
Reliable performance throughout the collection cycle
A thinner bag is not always a better choice. While it may reduce material usage, a bag that breaks before collection can create more mess and inconvenience.
What Compostable Food Waste Bags Are Made From
Compostable food waste bags are usually made from plant-based materials and compostable polymers rather than conventional plastic.
Common materials include:
PLA (polylactic acid), made from renewable plant sources
PBAT, a compostable polymer used to provide flexibility and strength
Other certified compostable blends
These materials are designed to break down in controlled composting environments.
If you want to understand the difference between compostable and biodegradable materials in more detail, our guide explains how these terms differ and why certification matters.
Pack Size and Cost Per Bag
When comparing compostable food waste bags, the cheapest pack price is not always the best value.
A better comparison is the cost per liner and how long each pack will last your household.
Factors to consider include:
Number of bags included
Cost per bag
Bag size
Strength and quality
Delivery costs
Buying larger quantities can often reduce the cost per bag, particularly for households that use food waste liners every day.
How Many Compostable Food Waste Bags Do You Need?
The number of liners you need depends on your household size, food habits, and how frequently your food waste is collected.
As a general guide:
Smaller households using a 6L kitchen caddy may use one liner every few days
Larger households may need more frequent replacements
Outdoor food waste bins using larger liners typically require fewer changes
Many households find that buying several months' supply at once is more convenient and reduces the chance of running out.
Are Compostable Food Waste Bags Accepted by UK Councils?
Acceptance depends on your local authority and waste collection provider.
Many UK councils recommend or require certified compostable liners for food waste collections, but requirements can vary.
Before purchasing, check your council's guidance or look for bags that meet recognised composting standards such as EN 13432.
Using the correct type of liner helps avoid contamination issues and ensures your food waste can be processed correctly.
Biofuture Compostable Food Waste Bags
At Biofuture, we provide certified compostable food waste liners designed for everyday UK food recycling.
Our liners are:
✔ EN 13432 certified compostable ✔ Designed for food waste caddies ✔ Available in 6L and 30L sizes ✔ Strong and leak-resistant for everyday food waste ✔ Delivered quickly across the UK
Whether you have started using a food waste collection service or simply want a cleaner way to manage kitchen scraps, choosing the right compostable liner makes the process easier.
Now you know what to look for, explore our range of certified compostable food waste bags designed for UK food waste collections.
FAQs About Compostable Food Waste Bags
Where can I buy compostable food waste bags?
You can buy compostable food waste bags from supermarkets, online retailers, and specialist compostable packaging suppliers. When choosing a product, check that it is certified compostable and suitable for food waste collections.
What are the best compostable food waste bags?
The best compostable food waste bags are those that are certified compostable, fit your food waste caddy correctly, and are strong enough to handle wet food waste without tearing.
Are compostable food waste bags the same as biodegradable bags?
No. Compostable bags are designed to break down under specific composting conditions, while biodegradable simply means a material can break down over time. Certification is the best way to confirm a product meets composting standards.
Can I use any compostable bag for my food waste bin?
Not necessarily. Some compostable bags are designed for general composting, while others are specifically tested for food waste collections. Always check that the bags meet your council's requirements.
