Alternatives to Zip Lock Bags: What to Use for Freezing, Lunches and Leftovers
The best alternative to zip lock bags depends on the job. Glass or steel containers suit the freezer and meal prep, a lunchbox suits sandwiches, reusable silicone bags suit snacks and packed lunches you will wash, and compostable resealable bags are the one that can simply be composted at home after use. Below, each job comes with the options that suit it, and what to watch out for.
If you are searching for a sustainable alternative to zip lock bags, an environmentally friendly alternative to zip lock bags, or an eco-friendly alternative to zip lock bags, the honest answer is that the most sustainable option is usually the one you will use again and again. A reusable container beats any disposable bag if it gets used for years. For the jobs where a reusable is awkward, a bag that can be composted at home is the natural choice.
A note on who we are. Biofuture supplies compostable food packaging and kitchen supplies, including compostable resealable bags, so we have included them below with their limits. Every job also lists options we don't sell.
Quick Guide: Which Alternative for Which Job
Job | Good options | Watch out for |
Freezing portions | Glass or steel container, reusable silicone bag, compostable freezer-suitable bag | Cool food first, leave headroom, label and date |
Sandwiches and lunches | Lunchbox, reusable pouch, beeswax wrap, paper bag, compostable bag | Soft fillings squash; check wraps are suitable for the food |
Snacks on the go | Small silicone pouch, fabric snack bag, tin, compostable bag | Crumbs and washing; fabric bags need a food-safe lining |
Leftovers and meal prep | Lidded container, jar, plate over a bowl, compostable bag or film | Eat chilled leftovers within two days or freeze them |
The Closest Like-for-Like Swap: Compostable Zip Lock Bags
If you want something that works like a zip lock bag, a compostable resealable bag is the nearest match. It is a clear bag with a press-to-close seal that you use once and then compost at home. Biofuture's compostable resealable bags come in gallon-size and sandwich sizes.
These bags are made from PLA and PBAT, which are bioplastics rather than conventional plastic. Unlike a conventional bag, they are designed to break down in compost rather than being built to last.
Our bags carry TÜV Austria OK compost HOME certification and meet EN 13432. These schemes cap total fluorine at 100 ppm, apply heavy metal limits, and test that the finished compost doesn't harm plant growth.
What to Use Instead of Zip Lock Bags for Freezing
Freezing is where the choice matters most. Which? points out that plastic can become brittle when frozen and may shed tiny fragments, which is why it suggests glass or steel for freezing and reheating. These options work well:
Freezer-safe glass containers. They don't stain or hold smells. Leave a gap at the top, because liquids expand as they freeze, and cool food first so the glass isn't shocked.
Stainless steel containers. Light, tough and stackable, though you can't see what is inside, so label them.
Reusable silicone bags. Good for flat-freezing soups, sauces and marinated meat. Check the brand's stated freezer rating, because it varies, and note that silicone is a synthetic material that most UK councils don't accept in kerbside recycling.
Paper inside a container. Useful for separating burgers, chops and fish fingers so they don't freeze into a block.
Compostable resealable bags. For a disposable option, the gallon-size bags are rated by the supplier as suitable for freezing. They suit portions of fruit, bread and cooked food that you will defrost and use.
The same food safety rules apply whatever you use. The Food Standards Agency says to divide food into smaller portions in containers or freezer bags so it cools quickly, freeze leftovers as soon as possible once cool, and freeze in individual portions so you only defrost what you need. A dated label helps.
Flat-freezing tip. Lay a filled bag flat, press out the air, and freeze it on a tray. Once solid it stacks like a book, takes up little room and defrosts quickly.
We froze portions of cooked rice and a tomato sauce, cooled first and laid flat, in compostable resealable bags and in a silicone bag. After four weeks, every bag looked unchanged and there was no freezer burn on the rice. The seal held on all but one compostable bag, where a seam gave way because we had overfilled it. Next time we would fill each bag no more than two thirds and squeeze the air out first.
Alternatives to Zip Lock Bags for Sandwiches and Lunches
The cheapest swap is no bag at all. A sandwich goes straight into a lunchbox, and fruit or snacks packed around it stop it sliding about. If you want to wrap or bag it, you have several options:
A lunchbox with compartments. Steel or plastic, it protects soft fillings and lasts for years.
Reusable pouches or silicone bags. They wipe or wash clean and suit wet fillings.
Beeswax wraps. They work well for bread and drier sandwiches. Makers generally advise not using them for raw meat, hot food, the microwave or hot water, and say they last about a year with care.
Paper bags. Simple and disposable, though coatings vary, so check the pack before assuming they can be composted or recycled.
Compostable resealable bags. The nearest match to a zip lock bag for lunches, and handy when you are packing for a group or giving food away. Sandwich-size bags are the closest fit.
Alternatives for Snacks and On-the-Go
For snacks, you want something small, light and easy to refill. Small silicone pouches work for fruit, nuts and crackers, and tins suit biscuits and cut fruit that mustn't be crushed. Fabric snack bags work for dry food, but check the lining is food-safe and washable. If you want a disposable bag, compostable resealable bags work for dry snacks, and you can see what is inside.
Alternatives for Leftovers and Meal Prep
Lidded containers are the best all-rounder for leftovers. A plate over a bowl, a jar with a lid for soup, or a stretchy silicone cover each work with no extra purchase. Compostable cling film is an option when you want something disposable to cover a bowl.
Whatever you use, cool leftovers quickly and keep them in the fridge. The FSA's advice is to eat chilled leftovers within two days or freeze them.
Zip Lock Bag Alternatives Compared
Option | Reusable or disposable | Plastic status | Freezer | Best for | Watch out for | End of life |
Glass container | Reusable | No plastic in the container (lid may be plastic) | Yes, leave headroom | Freezing, meal prep | Heavy, can break | Recycle as glass |
Steel container | Reusable | No plastic | Yes | Lunches, freezing | Can't see contents | Recycle as metal |
Silicone bag | Reusable | Synthetic material, often counted as plastic | Check the brand | Wet foods, snacks | Not accepted in most kerbside recycling | Check your council |
Beeswax wrap | Reusable | Cotton and wax | Not for freezing | Bread, cheese | Not for raw meat or heat | Check the maker |
Fabric snack bag | Reusable | Depends on the lining | No | Dry snacks | Lining must be food-safe | Check the maker |
Paper bag | Disposable | No plastic unless coated | Not suitable | Dry snacks, sandwiches | Coatings vary | Check the pack |
Compostable resealable bag | Disposable | PLA and PBAT bioplastics | Supplier-rated, see above | Single-use jobs, freezing portions | Not for meat, fish or dairy residues in the compost heap | Compost at home, see below |
Conventional zip lock bag | Disposable | Plastic | Yes | Convenience | Soft plastic only, if clean | Soft plastic drop-off points |
How to Compost Your Bags at Home
This is where compostable bags come into their own: when you are finished with one, it can simply go in your home compost. What was in the bag decides where it goes:
Fruit, vegetables, bread and dry foods. The bag and its contents can go straight into your home compost. Tear or cut the bag into smaller pieces first to speed things up.
Meat, fish, dairy and oily residues. These don't belong in a home compost bin, so the bag goes in general waste.
Never in soft plastic recycling. Compostable bags contaminate the stream.
Food waste caddy. Only if your council confirms it accepts compostable bags. Rules differ, so check first.
Home composting is a gradual process. Council guidance such as Cheshire East's notes it can take many months, and cold weather slows it down. Our guide to home and industrial composting explains the difference.
We buried three compostable bags, cut in half, in a home compost bin alongside vegetable peelings in spring. After 12 weeks, one bag had broken into small flakes and the other two were still partly intact, which fits the guidance that cold weather slows things down. We will check again at six months.
Can You Recycle Zip Lock Bags?
Mostly, not at the kerbside. Zero Waste Scotland says plastic bags and film go to supermarket collection points, and only when they are clean and free of food residue. That is why a bag that held raw meat or a messy sauce usually ends up in the bin. In England, the mandatory kerbside collection of plastic film has been delayed to 1 April 2030, so check your council's rules. Rules also differ across the UK nations.
Frequently Asked Questions
What is the best alternative to zip lock bags?
It depends on the job. Glass or steel containers suit the freezer, a lunchbox suits sandwiches, silicone bags suit wet foods and snacks, and compostable resealable bags suit single-use jobs, because they can be composted at home afterwards.
What is the most sustainable alternative to zip lock bags?
The one you use most often. A reusable container used for years has a lower impact than any disposable bag, so reusables are the better choice for everyday use. Compostable bags suit jobs where a reusable is impractical, and they can be composted at home afterwards.
Are there eco-friendly alternatives to zip lock bags?
Yes: glass, steel, silicone, beeswax wraps, fabric bags and compostable bags each have a place. None is perfect for every job, so the comparison table above shows where each one falls short.
Can I freeze food without zip lock bags?
Yes. Freezer-safe glass or steel containers, reusable silicone bags and paper inside a container all work. Cool food first, portion it, leave headroom for liquids and label with the date.
Can you freeze food in compostable bags?
It depends on the bag. Biofuture's gallon-size resealable bags are rated by the supplier as suitable for freezing. Always check the pack for your bag.
Can you compost compostable zip lock bags at home?
Biofuture's compostable resealable bags carry TÜV Austria OK compost HOME certification, so they are designed to break down in a home compost heap. It can take months, and bags that held meat, fish, dairy or oily food should go in general waste.
Can you reuse compostable bags?
They are designed for single use. If a bag is clean and dry you can use it again for dry food, but we don't recommend reusing one that held raw meat.
Ready to make the switch?
You don’t need to replace everything at once. Start with the job that uses the most bags in your kitchen, whether that is the freezer, the lunchbox or the leftovers shelf. For the single-use jobs, our compostable resealable bags can simply be composted at home afterwards, and you will find them alongside our compostable cling film and other kitchen supplies.
