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DATREX 3600 Emergency Food Bar

Eighteen 200-calorie bars per package — 3,600 calories total. US Coast Guard approved. No preparation needed. Coconut flavor, non-thirst-provoking formula. 5-year shelf life.

  • evacuation
  • 72-hour-kit
  • go-bag
By Editorial Team•Updated May 31, 2026•6 min read•How we research•Affiliate disclosure
DATREX DX3600F emergency ration package with food bars beside it

Who this is for

Go-bag essential, evacuation kits, car emergency supplies.

Skip if

A 30+ day food supply — this is a 72-hour product.

Preparedness Gear

DATREX 3600 Emergency Food Bar

Evaluated for household use · Affiliate links disclosed

Coast Guard-approved 72-hour food supply that fits in any bag

Why we chose it

At about a pound and a half with no prep required, it is the simplest way to put three days of calories in a go-bag or car kit.

Buy From

Datrex

Affiliate links · We earn a small commission at no cost to you. How this works
We evaluate every pick for real-world reliability.

Why this matters

Why this matters in an emergency

Not every emergency lets you boil water and cook a meal. Sometimes you're leaving fast — an evacuation, a car stuck in a storm, a go-bag grabbed on the way out the door — and food has to be something you can eat cold, straight from the wrapper, with nothing to prepare and no fuel to find. That's exactly what the Datrex 3600 is for.

It's a brick of eighteen calorie-dense bars, 3,600 calories total — three days of emergency rations — that weighs about a pound and a half, fits in any bag, needs no water and no cooking, and keeps for five years untouched. It's Coast Guard-approved, the kind of ration that lives in lifeboats, which tells you it's built to simply work when nothing else is convenient. It's not a meal you look forward to. It's the food that's there when there's no time or way to make anything else — and for a go-bag or a car kit, that's exactly the job.

How We Evaluated

How we evaluated this

We researched this the way we'd check out any ration before trusting it to a go-bag: manufacturer data, the certification behind it, and real owner reviews. We verified the specs that define an emergency ration — the 3,600 total calories across eighteen 200-calorie bars, the five-year shelf life, the roughly one-and-a-half-pound weight, and the U.S. Coast Guard approval, which means the bars meet a real marine-survival standard, including being non-thirst-provoking when water is scarce — and cross-referenced them against how comparable approved rations like SOS and Mainstay are specified.

Then we read widely through verified owner reviews for the practical truths the box won't tell you: how the bars actually taste (a coconut-ish shortbread, by most accounts), how they hold up to heat and time, and how people fit them into go-bags and car kits. We haven't lived on them for three days ourselves — but between the certification and the owner reports, we can tell you exactly what this ration is for, what it isn't, and why it earns its spot in a grab-and-go kit.

Our pick: DATREX 3600 Emergency Food Bar

The verdict

A compact 72-hour calorie source that earns its spot in any bag. Coast Guard-approved, no water or prep needed, and small enough to forget about until you need it.

Strengths
  • Fits in any bag — about 1.5 lb
  • No water needed
  • Coast Guard approved
Limitations
  • Not a complete nutrition source for extended use
  • Bland flavor

What it does well

The Datrex 3600 is built for one job — calories you can grab and go — and it nails it. The whole package is about a pound and a half and the size of a thick paperback, yet it holds 3,600 calories: a full three days of emergency rations at 1,200 a day, or a stretchable longer supply if you're rationing. It splits into eighteen pre-portioned 200-calorie bars, which makes rationing simple and keeps the rest sealed once you open the pack. There's nothing to prepare — no water, no heat, no utensils — so it works in the exact moments other food can't: an evacuation, a stranded car, a power-out night with no way to cook.

The details are reassuring. It's U.S. Coast Guard approved, the standard for lifeboat rations, which means it's been built to survive heat, time, and rough handling, and it's formulated to be non-thirst-provoking — important when you can't count on extra water. The five-year shelf life is long enough to set and forget with only occasional rotation, and the compact, durable block shrugs off being crammed in a bag for years. For a go-bag or car kit, it's about as foolproof as food gets.

What it does poorly

Be clear about what it is: survival fuel, not nutrition or pleasure. The bars are bland — a dry, vaguely coconut shortbread most people find fine in small amounts and tiresome in large ones — and they're not a balanced diet, so they're meant for short stretches, not weeks of living. At 1,200 calories a day, the '72-hour' supply is an emergency-ration level, below what an active adult normally eats, so you'll be hungry, by design. They can also crumble if crushed, and in real heat the texture suffers. None of this is a flaw exactly — it's the nature of a compact, shelf-stable ration — but it's why this is a backstop, not your main food plan.

Where it shines

Go-bags, car kits, and evacuation scenarios — anywhere weight, size, and zero-prep matter more than enjoyment. It's the food that's simply there, ready, when there's no time or way to make anything else, and at its price and size there's little reason not to tuck one in every bag.

Where it frustrates

If you expected a satisfying meal, the dry, bland bars will let you down — they're rations, not snacks. And if you're counting on it as a real food supply for more than a few days, the modest daily calories will leave you hungry. Use it for what it is, and it never disappoints.

Other options to consider

  • Mainstay 3600 / SOS emergency bars

    Nearly identical rivals — same 3,600 calories, the same molded ration-block format, and a similar lemony or shortbread flavor, so the choice usually comes down to price and taste. One difference worth pinning down: Datrex's Coast Guard approval (cert #160.046/8/0) is current and verified; the Mainstay's shows up on older and retailer listings but isn't confirmed on SOS Food Lab's current product page — so don't assume the rival carries the same certification. Any of them does the job; Datrex is simply one of the most widely available and trusted.

    Read full review →

  • Mountain House pouches

    Far better eating, but the wrong tool for grab-and-go. Freeze-dried meals taste vastly better and offer real nutrition, but they need hot water and a few minutes — exactly what you may not have in an evacuation. Keep Mountain House for sheltering in place; keep the Datrex for the bag you grab on the way out.

  • Granola bars or trail mix from the grocery store

    Tastier and cheaper per calorie — but they don't last. Everyday snacks are nicer to eat and fine for a short kit, but they go stale or rancid in months, not years, so you have to rotate them constantly. The Datrex's five-year shelf life and crush-resistant, heat-tolerant block are what make it a true set-and-forget go-bag ration.

You might also like

Mainstay 3600 Emergency Food Ration

The other famous ration block: 3,600 calories of scored, vacuum-sealed survival bar with a 5-year shelf life — now under SOS Food Lab, which makes a few old approval claims worth re-checking.

Read review →

Longevity

How long will this actually last

The Datrex 3600 is built to sit in a bag for years and still be ready, and its five-year shelf life reflects that — it's formulated and sealed to resist the heat, time, and rough handling that ruin ordinary food. That five years assumes reasonable storage, though, and the place most people keep it — a car — is the hardest on it: a trunk that bakes in summer heat will shorten the life and degrade the texture, so a climate-controlled go-bag lasts closer to the full rating than a glovebox does.

The bars themselves have no moving parts to fail; the failure mode is simply age and heat, so the maintenance is just a calendar reminder to replace the block around the five-year mark, and to check it if it's lived through some brutal summers. The sealed outer pack is what protects the bars, so don't open it until you need it — once opened, eat the bars within the marked window. Buy it, date it, stash it in every bag, and replace it every few years: that's the entire lifecycle.

Questions people actually ask

How many days of food is the Datrex 3600?
It's designed as a three-day (72-hour) emergency ration: 3,600 total calories split into eighteen 200-calorie bars, or 1,200 calories a day for three days. That's an emergency-ration level — deliberately below what you'd normally eat — so you'll feel hungry but stay fueled and functional. If you ration more carefully, one block can stretch to feed a person longer at lower calories, or feed more than one person for a shorter time. For a single adult's grab-and-go three-day supply, one block is the right unit.
Does it need water or cooking?
No — and that's the whole point. The bars are ready to eat straight from the wrapper, with no water, no heat, and no utensils required, which is exactly why they belong in a go-bag or car kit where you may not be able to cook. They're also specially formulated to be non-thirst-provoking, so eating them doesn't make you crave water you might not have. Just keep some drinking water with your kit anyway, because hydration matters in any emergency — but the food itself asks nothing of you.
What do they actually taste like?
Most people describe them as a dry, slightly sweet, coconut-ish shortbread or sugar cookie — bland but not unpleasant in small amounts. They're survival rations, not a treat, so they get tiresome if that's all you're eating for days, but they go down easily and kids generally tolerate them. The texture is dense and a little crumbly. If you're imagining a satisfying snack, adjust expectations; if you're imagining reliable, edible calories when nothing else is available, that's exactly what they are.
How should I store them, and how long do they really last?
Five years is the rated shelf life, and you'll get closest to it by storing the sealed block somewhere that isn't baking hot. The catch is that car kits — a common home for these — see brutal summer heat, which shortens the life and degrades the texture, so a climate-controlled bag holds up better than a trunk. Keep the outer package sealed until you need it, note the date, and plan to replace the block every few years (sooner if it's lived through harsh heat). There's nothing else to maintain.
Is this enough food for my whole emergency plan?
No — and it's not meant to be. The Datrex is a short-term, grab-and-go ration for the first 72 hours of an evacuation or a sudden disruption, not a complete food supply. For sheltering in place or a longer event, you'll want more substantial, better-tasting, more nutritionally complete food, like a 30-day kit or a rotated pantry. Think of the Datrex as the food in the bag you grab on the way out the door, and your home food supply as a separate, larger layer. Most prepared households have both.

Technical Specifications

Bars18
Calories3600
Weight Oz24.8
Shelf Life5 years
CertificationsUS Coast Guard approved (#160.046/8/0)

Sources we consulted

We may earn a commission when you buy through links on this page. How this works

Preparedness Gear

DATREX 3600 Emergency Food Bar

Evaluated for household use · Affiliate links disclosed

Coast Guard-approved 72-hour food supply that fits in any bag

Why we chose it

At about a pound and a half with no prep required, it is the simplest way to put three days of calories in a go-bag or car kit.

Buy From

Datrex

Affiliate links · We earn a small commission at no cost to you. How this works
We evaluate every pick for real-world reliability.