Good packaging is the single biggest factor in how long your food storage actually lasts. Whether you're building a long-term emergency supply or keeping garden produce through winter, the right container is the only thing standing between your food and the three forces that spoil it: light, oxygen and moisture.
Here's how to package freeze-dried and dehydrated food so it stays good for years — and when you can skip the work entirely.
Do you even need to repackage?
Most freeze-dried food from Thrive Freeze already arrives sealed in #10 cans or heavy-duty Mylar pouches with oxygen absorbers, rated for up to 25–30 years unopened. In that case there is nothing to do — just store it somewhere cool and dark.
You'll mainly repackage when you are buying staples in bulk, splitting large cans into smaller portions, or storing your own dehydrated garden produce. That's what the rest of this guide covers.
The three enemies of stored food
- Oxygen — causes rancidity and lets mold and bacteria grow. Remove it with oxygen absorbers and an airtight seal.
- Moisture — even slight humidity ruins dry food. Pack only fully dried food, and add a desiccant where useful.
- Light — breaks down nutrients and color over time. Use opaque containers or a dark storage space.
Best packaging options
Mylar bags + oxygen absorbers
The go-to for long-term storage. Mylar blocks light and air completely. Fill the bag, drop in an oxygen absorber sized to the volume, press out the air and heat-seal the top. Lightweight, stackable and easy to portion.
#10 cans
The gold standard for shelf life — metal is fully opaque and airtight, which is why most commercial freeze-dried food ships this way. Best for food you won't open for years.
Glass jars (vacuum-sealed)
Great for food you'll use within a few months to a couple of years. Use a vacuum sealer with a jar attachment and keep jars out of direct light.
Food-grade buckets
A useful outer layer for Mylar bags of bulk grains and beans — they add rodent and crush protection, but aren't airtight on their own.
How to package, step by step
- Make sure the food is completely dry — any residual moisture will spoil it.
- Fill your Mylar bag or jar, leaving a little headspace.
- Add the correct size oxygen absorber for the container volume.
- Remove as much air as possible, then heat-seal (Mylar) or vacuum-seal (jar).
- Label each container with the contents and the date.
- Store in a cool, dark, dry place, away from heat.
Storage conditions matter most
Even perfect packaging can't beat heat. Aim for a stable spot under about 70°F; every 10°F cooler can meaningfully extend shelf life. Keep containers off concrete floors and out of sunlight. For a deeper dive, see our guide to how long freeze-dried food lasts.
Prefer to skip the DIY entirely? Every product at Thrive Freeze already comes packaged for the long haul, so you can build a pantry without buying a single oxygen absorber.
Every Thrive Freeze product ships sealed for the long haul, much of it rated 25–30 years.
