Once the blueberries are fully frozen, you'll want to transfer them into a sealed container as soon as possible so that they don't develop freezer burn. Transfer the frozen berries to your freezer-friendly container of choice such as a freezer bag or freezer-proof tupperware.
Freezing fresh blueberries is as simple as the delicious little berries themselves. Just bring them home and pop them into the freezer! You can even use the plastic clamshell container you purchased them in. Ideally, freeze your blueberries as they are and wait to rinse them when you take them out of the freezer.
Refrigerate fresh berries right after grocery shopping or a visit to the blueberry patch. You can store them in the plastic clamshell they come in, or in a large, un-covered bowl or container. Don't store fresh blueberries in an airtight container as this can trap moisture and speed up mold and rot.
As for the berries you're not eating, be sure to store them in the fridge in a container that can breathe. That means no air-tight plastic or glass containers—though if that's all you have on hand, just leave the lid slightly ajar.
Make sure the fruit pieces are not touching each other so they don't freeze together and create a giant, frozen, fruity mass. Once frozen, remove them from the cookie sheet, and store in some sort of freezer-safe container – either freezer bags or tupperware works great.
Plastic containers can be used for freezing food but should be replaced if damaged and you should take care with washing and when heating them.
Choose a container with good airflow (like the pint the berries came in!), and line it with a paper towel to absorb excess moisture. Add the berries, then place the container on a shelf in the refrigerator. A shelf is better than the crisper drawer because there's better air circulation.
Storing Fresh Blueberries in the Refrigerator
Transfer the dry berries to an airtight container lined with a layer of paper towels. Make sure to put them in a shallow layer so that the weight of the berries doesn't crush the ones on the bottom. A layer no deeper than an inch and a half or so is fine.
It is convenient to toss your blueberries in a Ziploc and toss them in the freezer. That works.
Best containers for freezing blueberries
You can freeze blueberries in mason jars, quart or gallon sized freezer bags, or any freezer safe food container. I personally love these reusable silicone bags! They're clear so I can see what's inside and they're dishwasher safe to reuse.
Store the frozen berries in a large zip-top freezer bag, this way you can stack several bags together and easily open the bag to remove just the right amount when needed. Remember to label and date the bag before storing. Alternatively, you can move them to a freezer-safe container with a lid for longer storage.
Defrost berries: Use a cold-water bath
Instead of microwaving, which can make frozen berries soggy, pour them into a bowl and cover with cold water. This will thaw one cup of blueberries in about five minutes.
In general, you can simply transfer berries to the freezer in their unwashed state — making sure to label them as unwashed, so that you wash them before use — but if you prefer to wash them beforehand, lay them out on a paper towel to make sure they are completely dry before freezing.
Freezing Food
Usually, the best plastic container to store frozen food is a moisture-vapor-resistant plastic container with a lid. These plastics are quite safe and can be used for years. On the other hand, you can consider using Pyrex glass containers with lids to freeze, microwave and store food.
If you are wondering how how long can you freeze blueberries, if they are flash frozen and properly stored in a freezer bag they last about 6 months but if you freeze them with a vacuum sealer, they last a few months longer, about 12 months.
One of the cardinal rules of keeping berries mold-free is to leave them unwashed until the moment before consumption. But, by washing your berries in a solution of vinegar and water, you can extend their shelf-life by days (sometimes even weeks!).
The best place to store blueberries is in the fridge where the shelf life of blueberries is about 2 weeks if properly stored. If you choose to freeze them, they will last for about 10 months.
Make sure your blueberries are dry
Then transfer the berries to a breathable container that you've lined with paper towels, such as the box or basket the berries came in. The paper towel will absorb any excess moisture, and the air circulation will deter mold.
Freezing in glass is healthier for you and your family
It will never leach harmful chemicals into your food.
Rigid containers and flexible bags or wrapping are two general types of packaging materials that are safe for freezing. Rigid containers made of plastic or glass are suitable for all packs and are especially good for liquid packs. Straight sides on rigid containers make the frozen food much easier to remove.
Freeze fruit in containers or bags designed for freezer storage. Rigid plastic containers or glass jars with tight fitting lids work well. Plastic freezer bags are also convenient to use but do not use food storage bags because the plastic in food storage bags is not thick enough to seal in moisture.