Shipping eggs in a box without breaking them: keep the carton still, not just cushioned

An egg carton is designed to stand flat in a crate, on a shelf, with other cartons of the same size stacked squarely on top. A grocery delivery box is nothing like that.

The carton sits next to a 1 litre bottle of oil and a 5 kg bag of atta, the box is tipped and swung, and the fill around it settles on the way. I look at this the way we look at any pack at our plant. What carries the load, and what stops the movement?

Here is the short answer, as I see it. Eggs rarely break in a grocery box because there was too little cushioning. They break because the carton moved, tilted onto its side, or carried the weight of something heavier.

The fix is to hold the carton flat, upright and still inside something rigid that takes the load instead of the lid. That can be a corrugated sleeve, a tray or a compartment. Pack the eggs last, on a level layer near the top, with nothing heavier above them. More bubble wrap or more paper around a loose carton usually does not solve the problem.

For eggs sent by courier, the rule is the same in a stricter form. Each egg is wrapped and stood on end in a rigid box, and every gap is filled so the eggs cannot strike each other or the box.

Why the carton cracks even with void fill

There are five ways, and one broken order can show more than one.

1. Weight from above. The lid of a pulp or plastic carton is thin. A bag of flour or a bottle resting on it pushes the lid down onto the tops of the eggs.
2. Squeeze from the sides. In a tight box, the carton is pressed between two hard items, and the cells cannot spread the load.
3. Tilt. If the carton ends up on its side or at an angle, the eggs lie on their sides in the cells and knock against the walls.
4. Slide. Loose fill settles during the trip, a gap opens, and the carton slides into the wall of the box at every turn and every brake.
5. Rocking. Very soft cushioning lets the carton rock, and each egg taps against its cell again and again.

Look at a cracked order before you change anything. We start with the evidence before we change any material.

Cracks on the tops of the eggs point to weight from above. Cracks along one side of the carton point to sliding or a side squeeze. A carton found on its side tells its own story. Our guide to why products break in transit shows how to read this kind of evidence for any product.

Why more cushioning is not the answer

This is a strange thing for a cushioning maker to say, but I believe it.

We make air cushions and paper void fill, and both are good at filling gaps. Neither is good at carrying weight on a fragile lid.

Cushioning slows an impact. The egg carton's problem is mostly not impact. It is load and movement. Soft fill moves and settles, so the carton that was snug at the packing table can be loose by the second stop. And fill pushed in on top of the carton puts more weight on the lid, not less.

What the carton needs is structure: something rigid that stands taller than the lid, takes the weight of whatever is above, and stops the carton moving sideways.

Sleeve, tray or compartment: what works better

1. A corrugated sleeve. This is a rigid open tube that slides over the carton, a little taller than the lid and a close fit on the sides. Anything placed on top rests on the sleeve walls, not on the eggs. Ask your box maker for one sized to the carton you use.
2. A compartment. If you pack the same grocery box every day, a fixed divider that keeps the eggs in one corner, with a flap over it, works like a sleeve and is quicker to pack.
3. Pulp trays in a rigid box. For larger quantities, stack trays in a box that they fill closely, with a lid that sits on the box walls. The trays should not move at all when the box is closed.
4. A small separate box. This is the simplest fix for occasional orders. Put the carton in a small box with the gaps filled, and pack that box on top.

If I packed eggs every day, I would choose the sleeve. It is quick to fit, it adds little weight, and it deals with weight from above and with sliding at the same time.

Packing order in a grocery box

We suggest this order for a mixed box. It keeps the heavy things low and the eggs on a level floor.

1. Heavy, hard items go in first and lie flat: bottles, tins, bags of flour, rice and pulses.
2. Fill the gaps between them so the top of this layer is level. A level floor stops the egg carton tilting.
3. Put the eggs in their sleeve or small box on that level layer, flat and lid up.
4. Pack light, soft items around and above the eggs: bread, leafy vegetables, snacks.
5. Fill any remaining gaps around the sleeve with paper or air cushions, so nothing slides.
6. Never put anything heavier than the eggs on top of them, even inside a sleeve.
7. Keep chilled and frozen items in their own sealed bag. Cold items gather water on the outside, and a wet pulp carton gets soft.
8. Close the box, mark "This way up" on its sides, and tell the delivery person that it carries eggs.

Shipping eggs by courier

Courier is harder than a grocery round, because the parcel is sorted, stacked and handled by people who do not know what is inside.

First, ask your courier whether it accepts eggs at all, and on what terms. I would not book a pickup on an assumption. Rules for food and perishables differ between couriers and services, so get the answer in writing.

The clearest packing rule I found is in the US Postal Service's International Mail Manual, section 138.3, which I read in November 2026. It allows eggs to be mailed abroad only by Priority Mail International. For eggs to Canada, it accepts a box of rigid material with a tight-fitting lid, with each egg wrapped in protective material and placed on end, and every empty space filled so the eggs cannot strike each other or the box. For every other country, it asks for a metal egg container inside a wooden outer box, with cushioning between the two.

That Canada rule is a good model even inside one country, and I would add a second box around it. The DHL Express essential packing guide (valid from 25 February 2026) describes the box-in-box method well. The outer box is at least 14 cm larger than the inner box in every dimension, with about 6 cm of fill under it.

1. Wrap each egg on its own in a layer of bubble wrap or paper.
2. Stand the wrapped eggs on end in a carton or a cell divider.
3. Put the carton in a rigid inner box with a tight lid, and fill every gap.
4. Put that box in the centre of the outer box, on 6 cm of fill, with fill on every side and on top.
5. Shake the parcel. If anything moves, add fill and shake it again.

A check you can do with a few trays of eggs

You do not need a lab for this. You need real eggs and an honest count, and we would trust that count more than any opinion, including mine.

1. Pack 3 boxes the old way and 3 the new way, with 12 eggs in each, using the same box and the same heaviest item you usually sell.
2. Send all six on your normal delivery route, or carry them in a vehicle for the same distance.
3. Open them in a dark room. Shine a phone torch through each egg from behind. A hairline crack shows up as a thin line of light in the shell.
4. Count cracked eggs, including hairline cracks, for each pack.
5. Repeat the run at least once more before you decide. One trip can be lucky, and we would not change a pack on the strength of a lucky trip.

If you want to add a drop test, our guide to running a drop test in your own warehouse explains how to do it fairly.

Where our materials fit, and where they do not

We make air cushions, paper void fill and tape in Jaipur, and all three have a place in a grocery box. They fill the gaps around the sleeve and the other items, they stop the layers sliding, and the tape keeps the box closed.

None of them is the sleeve. The rigid part, which does most of the work for eggs, is a corrugated job, and we do not make boxes.

I would rather you spend on a well-fitted sleeve than on twice as much fill.

If you pack eggs every day and want a second opinion on the rest of the box, write to us through the contact page with the box size and what usually goes in it.