Freezing Food in Glass - Why We Love It, What You Can Freeze, & Tips

How to freeze food in glass, what you can freeze in glass, how to freeze food in glass safely. Are you looking for safe ways to store food for a long period of time, to keep leftovers for later, excess fruit and veggies, or even baked goods? Glass is an excellent way to store food, whether it be in the pantry, the fridge, or even the freezer. It is perfectly safe and very easy to freeze food in glass, but there are a few things to keep in mind. We share why we love glass storage in the freezer, what foods can be frozen in glass, and tips for freezing food in glass. 


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Why We Love Freezing Food In Glass

Glass is healthier for the environment
  • Unlike plastic, glass is not made of petrochemicals.
  • Glass is a resource-efficient material, made of abundant natural raw materials, including sand and glass waste.
  • Some glass can be recycled such as glass food packaging jars and bottles, but not tempered glass.
Freezing in glass is healthier for you and your family
  • Glass does not contain BPA, PVC, Phthalates or hormone-disrupting chemicals
  • It will never leach harmful chemicals into your food.
Results in less food waste
  • Using glass minimises waste from plastic zip-lock bags and plastic containers
  • Leftovers can be frozen instead of being left in the fridge
  • Vegetable scraps can be frozen to make broth and soups later
  • The contents in glass jars and containers can been seen, so food isn't likely to 'disappear' in the deep dark depths of the freezer
Glass is easy to keep in top condition
  • Glass is non-porous, and doesn't absorb smells or discolour
  • Glass is scratch proof, and after years of use it will still look new
  • It is easy to clean in soapy water, plus it is dishwasher safe
  • It dries quickly because it is not a porous material, unlike plastic
  • High quality, freezer-friendly glass jars and containers are in-expensive and versatile.
  • Saving glass jars from pasta sauce, condiments, pickles, etc, is an affordable way to grow your glass jar collection.

What Foods Can You Freeze in Glass

  • Beans - after cooking dried beans, allow to cool before you put them into a mason jar or glass container with or without liquid
  • Biscuits - after cooking and cooling biscuits, freeze in a wide mouth jar
  • Fruit and vegetables - first lay fruit out flat on a tray, freeze, and then transfer to a glass jar or container to go back into the freezer
  • Citrus zest - save those zests and reduce food waste by freezing them in a glass jar or container
  • Vegetable peels and scraps - great to keep on hand to make broth later on and easy to freeze in a glass jar or container
  • Broth - if freezing broth, be sure to leave a 3cm gap from the glass jar or container (you could also use a stainless steel ice cube tray to freeze broth too)
  • Soups and sauces - when freezing any liquid no matter what the consistency, it is important to leave at least a 3cm gap from the top
  • Baby food - make lots in one go and freeze in glass baby food containers, for quick, healthy meals every day
  • Leftovers - divide leftovers up into single meal size portions for easy grab and go mid week meals

Tips for Freezing Food in Glass

1. As we all know, liquids expand when frozen, so it is always advisable to leave a 3cm gap from the top of the jar or container when storing anything in the freezer. If you don't leave a 3cm gap from the top, the glass jar or container may crack.

2. Not all glass withstands thermal stress the same, so we recommend you use glass containers that are made of borosilicate glass or tempered glass when heating and freezing food and drinks.

3. You can reuse old glass jars but be mindful that they may pose a higher risk of cracking when frozen.  Generally, glass jars with food inside sold in supermarkets such as jam and sauces are made from recyclable soda ash glass.

4. Lids: You can free with metal or plastic lids, but always sit lids loosely on the glass container or jar - do not screw tight or fully seal!   First, allow the food to freeze and expand and then adjust the lid a little more tightly.

5. We don't recommend using thin-necked bottles due to their risk of cracking. 

Our recommended containers for freezing food in glass, are the Kilner Fresh Storage Glass Container range with plastic snap-on lids (tip: remember to leave them loose when freezing).  

 Freezing Food in Freezer Safe Glass Containers


And these Glasslock glass containers with plastic snap-on lids.

Glasslock glass container that is safe for freezing food

 Remember, that you can shop with your exclusive discount code to receive 15% off our entire site, including all our glass containers that are convenient and safe for freezing food in glass.  

Shop all glass jars and containers online at Biome here >

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