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First In, First Out: The Easiest Way to Waste Less Food

You unpack the groceries, push the new yogurt to the front of the fridge, and close the door. A week later you find the old yogurt in the back, well past its date. Nobody meant for that to happen. The new stuff just got in the way.

There's a simple fix for this, and grocery stores and restaurant kitchens have used it forever. It's called first in, first out, or FIFO. The idea: the food that came into your home first is the food you use first. That's it. No special containers, no big makeover, just a small change in where you put things.

Here's how to make it work in your pantry, fridge, and freezer.

What first in, first out actually means

When you bring home something you already have, the new one goes behind the old one. The older item stays in front, where you'll see it and grab it first.

It sounds almost too simple, but it solves the most common reason food goes to waste at home: we forget it's there. Things don't usually spoil because we don't want them. They spoil because they ended up behind a newer box of the same thing.

FIFO works best paired with a quick look at dates. Most of the time, older items have earlier dates. But not always (a can you bought last week might have a later date than one you bought today), so when in doubt, put the earliest date up front.

Step 1: Pick one spot to start

Don't try to do your whole kitchen at once. Pick the spot where food most often gets lost. For a lot of homes, that's one of these:

  • The fridge shelf where leftovers and dairy live
  • The pantry shelf with canned goods
  • The freezer (the land of mystery bags)

Start there. Once the habit sticks in one spot, it spreads to the rest of your kitchen on its own.

If you've never taken stock of what you have, our guide on how to do a pantry inventory in 20 minutes is a good first step.

Step 2: Do one quick reset

Pull everything out of the spot you picked. As you put it back:

  1. Check the date on each item.
  2. Toss anything past its date or that looks, smells, or feels off.
  3. Group like items together, so all the canned tomatoes sit in one row.
  4. Put the earliest date in front, then the next, then the newest in back.

This is the only time you have to do the full sort. After this, you just keep it going.

Step 3: Unpack groceries "back to front"

This is the whole habit, and it takes about ten extra seconds per trip.

When you unpack, don't put new items in the easiest open spot. Instead, slide the older items forward, then put the new ones behind them. For the fridge, that means moving the opened milk to the front before the new carton goes in. For the pantry, it means new cans go to the back of the row.

A few tricks that make this easier:

  • Load from the back. If a shelf is deep, pull the row forward and add new items behind it.
  • Use a bin or tray for small things. Yogurt cups, snack packs, and sauce packets are easier to rotate in a bin you can pull out.
  • Keep rows narrow. One item wide and several deep is easier to rotate than a big pile.

Step 4: Make "use first" obvious

Sometimes you have something that needs to be eaten soon, and it's easy to miss. Give it a home where it can't hide.

  • A "use first" bin in the fridge. Put leftovers, half-used produce, and anything close to its date here. When someone wants a snack or you're planning dinner, check this bin first.
  • A "use first" spot in the pantry. One small basket at eye level for opened bags, the last few crackers, or anything nearing its date.
  • A front row in the freezer. Older freezer items go to the top or front, where you'll see them when you open the door.

The bin trick is helpful when you share a kitchen. It tells everyone in your home "start here" without anyone having to say it.

Step 5: Label what doesn't come with a date

Store-bought food usually has a printed date. Leftovers, freezer bags, and food you've moved into containers don't. Those are the ones that get lost.

Keep a roll of masking tape and a marker in the kitchen. When you put something in a container or freezer bag, write two things:

  • What it is ("chili," not just "soup")
  • The date you made it or froze it

That's enough to keep FIFO working. You'll always know which container is older.

A quick note on dates and food safety

Dates on food packages don't all mean the same thing. Some are about best quality, and some are about safety. Package labels can vary, so always follow what's printed on the package and the storage directions that come with it.

For leftovers, many food safety guides suggest eating them within about 3 to 4 days in the fridge. If you aren't sure how long something is good for, it's better to play it safe. And if something looks, smells, or feels wrong, don't taste it to check. Toss it.

FIFO isn't about stretching food past its limits. It's about using food while it's still at its best, so less of it ends up in the trash.

Where FIFO pays off most

Some spots get more out of this habit than others:

  • Dairy and eggs. It's easy to open a new carton before finishing the old one. Keep the open one in front.
  • Bread and tortillas. Keep one package out and open at a time. Extras can go in the freezer.
  • Canned goods. These tend to last a long time, which is exactly why old cans get buried. Rotate them anyway.
  • Bulk buys. If you shop in bulk, keep the extra stock in a separate spot and bring out one at a time, oldest first.
  • The freezer. Freezing keeps food safe, but quality slowly drops over time. Rotating keeps you eating the older stuff before it gets freezer burn.

Keeping it up

The reset is a one-time job. The habit is what keeps food from going to waste. To make it stick:

  • Rotate every time you unpack groceries. Ten seconds, every trip.
  • Check the "use first" bin before you cook or before you write a shopping list.
  • Do a quick date check once a week. Five minutes on a weekend morning is plenty.
  • Tell everyone in your home. FIFO only works if the person unpacking the groceries knows the rule. A sticky note on the fridge works fine.

Doing it with Domesio

A label and a marker go a long way. But when more than one person shops for your home, it's hard to keep track of what's already in the back of the pantry.

If you'd like some help, Domesio is a free home inventory app. Add expiration dates to items so you can see what to use first, and organize everything by location, like your pantry, fridge, or freezer. Set low-stock alerts on the things you always need, and add anything that's running out to your shopping list. Everyone in your home can share the same inventory, so whoever unpacks the groceries knows what's already there.

App or not, the rule is the same: old in front, new in back. Your future self (and that yogurt) will thank you.