Food & Water
Can you reuse milk jugs for water? What's safe to keep
Before you reuse milk jugs for stored drinking water, it helps to know exactly which garage containers the guidance rules out, which it allows, and what the recycling code on the bottom cannot tell you.
On this page (12 sections)
- Can you reuse milk jugs? The short answer
- Why milk jugs and thin juice bottles fail over months
- Recycling codes 1, 2, 4, 5 and 7: what they decide, and what they don't
- The shelf check before anything gets filled
- The rinse-and-label routine for the containers you keep
- How much water to store, and why that decides your containers
- What to buy instead, and what this page won't do
- If something goes wrong
- When to get help
- Frequently asked questions
- Keep going
- Sources
You've read that the wrong plastic can leach into stored water, and now every jug in the garage looks like a gamble: last week's milk jug, the juice bottle, the 2-liter the kids left in the car. Before you reuse milk jugs or any of those bottles for drinking water, you want one rule that sorts container from container. That rule is simpler than the recycling triangle makes it look.
Here's what unsticks the decision. Plastic milk jugs are the one container the extension guidance names outright and tells you not to reuse for stored drinking water. Food-use screw-top bottles get a different answer, with conditions attached. Below is the sort you can run down a garage shelf in about a minute, what the codes on the bottom do and don't decide, and the rinse-and-label routine for whatever you keep.
Key takeaways
- Don't reuse plastic milk jugs for stored drinking water: the plastic is made to biodegrade and can develop leaks, and protein from the milk can cause the stored water to spoil (OSU Extension).
- The recycling code names a plastic family. It is not a food-contact statement, and it can't tell you what the container held.
- Food-use screw-top containers — soda bottles, juice bottles, water jugs — are acceptable for stored tap water once they're cleaned and sanitized (OSU Extension).
- The two cited sources give different sanitizing strengths: the FDA's 1 tablespoon of bleach per gallon for 15 minutes, or OSU's 1 teaspoon per quart for at least 30 seconds. Pick one and follow it exactly.
- Store water cool, dark and dry, away from cleaners and anything smelly, and label every container "Drinking Water" with the date.
- Two weeks is about 14 gallons per person and pet, and a gallon of water weighs 8.3 pounds — that math decides which containers are worth keeping.
Things this guide mentions
Amazon searches, not product picks: we have not tested what they show. Check the specs and the return policy on each listing before you buy.
Can you reuse milk jugs? The short answer
Oregon State University Extension's water-storage publication is direct: don't use repurposed plastic milk jugs to store tap water for emergencies. It gives two reasons. The plastic is made from biodegradable material that can develop leaks, and protein from the milk can cause the stored water to spoil.
Neither problem goes away with a harder rinse, a longer bleach soak or a day in the sun. The plastic is built to break down over time, which is fine for a jug headed for the recycling bin and wrong for one asked to hold drinking water through a summer on a garage shelf. A thin-walled jug with a narrow neck is also hard to drain and dry, and you can't see inside to check.
So to "is it safe to reuse milk jugs for water?" the answer is no, and it doesn't change if you sanitize first. Rinse them for the garden, the shop or the recycling bin, and keep them out of your drinking-water plan.
Why milk jugs and thin juice bottles fail over months
A container filled for a storm that passes in a day is doing a small job. One filled in November and opened in July is doing a hard one: temperature swings, the weight of the water pressing on the walls, and whatever residue sat inside when the cap went on. A milk jug's corners and handle are exactly where the wall flexes each time it's carried, and a closet shelf is a bad place to find out that a flex point became a leak.
Juice and soda bottles are a different category. The same publication lists screw-top containers manufactured for food use — plastic soda bottles, juice bottles or water jugs — as acceptable for storing tap water, and names food-grade heavy-duty buckets, carboys or drums as the best option. That ranking is about durability, not a defect in the bottle. A soda bottle is allowed; it just isn't built to be a permanent fixture.
A juice bottle's weak spot is cleanup. Sugar residue settles into the threads and the base, the walls are thin enough to crease, and a crease is where water sits and a crack starts. Treat juice and soda bottles as fill-and-refresh containers: good for the two weeks of a real outage, not a ten-year plan.
Two conditions apply to whatever you keep. OSU notes a food-safety concern about foods stored in plastic containers above 95 °F (35 °C), which is why the guidance is to keep them cool, dark and dry — a garage shelf that bakes in July is the wrong home. And commercially bottled water should be replaced every six months for quality purposes. If the factory-sealed bottle has a rotation schedule, so does yours.
Recycling codes 1, 2, 4, 5 and 7: what they decide, and what they don't
Turn a container over and you'll usually find a number inside a triangle. The number names the plastic family the container is made from. It is not a food-contact rating, and it says nothing about what the container has held since it left the store.
The cited guidance uses the mark narrowly. OSU recommends food-grade, heavy-duty plastic buckets, carboys or drums stamped with a PETE or HDPE recycle code — codes 1 and 2 — and stops there. It doesn't rate codes 4, 5 or 7, and it doesn't say a code proves a container is safe for drinking water. So use the number as a starting point and let two other questions finish the job: did the maker intend this container for food, and what has it held since?
| Container | Code | For stored drinking water? | Your move |
|---|---|---|---|
| Plastic milk jug | 2 (HDPE) | No | Biodegradable plastic can develop leaks and milk protein can spoil the water (OSU). Garden, shop or recycling. |
| 2-liter soda bottle | 1 (PETE) | Yes | On OSU's list of food-use screw-top containers. Keep it cool, dark and dry, and rotate the water. |
| Juice bottle or water jug | 1 (PETE) | Yes, shorter service life | Sugar residue and thin walls make it a fill-fresh container rather than a fixture. |
| Food-grade bucket, carboy or drum | 1 or 2 | Best option | OSU's recommendation for larger volumes. Confirm the maker's food-use wording, then wash and sanitize. |
| Yogurt, margarine or takeout tub | 5 (PP) | No | Not built to seal, and the cited guidance doesn't cover it. Keep it for dry goods. |
| Thin squeeze bottle, bag or lid | 4 (LDPE) | No | Not a water container. |
| Water-cooler bottle or mixed plastic | 7 (other) | Only if the maker states food contact | Code 7 is a catch-all. Judge it on the maker's wording and the container's history. |
| Glass jars and bottles | none | Not for water you'll move | The same publication notes glass can break. |
| Anything that held cleaner, oil, pesticide or an unknown | any | Never | Plastic takes on what it holds, and you can't test the inside at home. |
One practical rule the sources don't have to spell out: a bakery's frosting bucket is a candidate; a bucket that has sat on the garage floor holding who-knows-what is not.
The shelf check before anything gets filled
Run this down one shelf at a time, on the page, and let each container answer for itself.
- The container was manufactured for food use, and the maker's wording is on it or on a spec sheet you can keep.
- It is not a plastic milk jug — those go to the garden or the recycling bin, however clean they are.
- You know what has been in it. Cleaner, oil, pesticide or "not sure" means it's out.
- The screw top seals, and there are no creases, cracks, cloudiness or repairs.
- You can lift it when it's full; a gallon of water weighs 8.3 pounds.
- You have a cool, dark, dry spot for it, away from cleaning supplies and anything with a strong odor.
The rinse-and-label routine for the containers you keep
Every container that passes the check gets the same treatment. It's a sink job that takes about fifteen minutes, and it's what turns a bottle in the garage into part of a water plan.
Wash with warm, soapy water and rinse with hot water
Inside and out, cap and threads included, because that's where residue hides. A bottle brush does in a minute what shaking won't.
Done when: the rinse runs clear and the container doesn't smell of soap.
Sanitize with one bleach figure, followed exactly
The FDA's sanitizing solution for food-contact surfaces is 1 tablespoon of unscented household liquid bleach at 5.25% sodium hypochlorite per gallon of water, with 15 minutes of contact. The OSU publication cited here gives a different container mix: 1 teaspoon of unscented bleach per quart, shaken so it coats the inside, left at least 30 seconds, then poured out, with the container air dried or rinsed with clean water. The two agree on the bleach and disagree on strength and time. Pick one and follow it exactly rather than blending them; this page uses the FDA figure because it's written for food-contact surfaces and gives a contact time you can put on a timer.
Done when: every inside surface has been wet for the full contact time and the container is draining.
Fill from a source you trust, then label it
Municipal tap water is already treated, so no additional treatment is needed (OSU). Water from a well or spring that's known to be pathogen-free but isn't chemically treated should be purified first: a rolling boil for one minute, three minutes above 5,000 feet (EPA; OSU uses 6,500 feet), or 8 drops (1/8 teaspoon) of unscented household bleach per gallon, stirred and left 30 minutes. OSU gives that 8-drop dose for 8.25% bleach and the FDA gives it for 5.25%, so the bottle in your hand decides the dose — if yours prints 6% or 8.25%, use the chart in how to disinfect water with bleach instead of guessing. A wide-mouth funnel keeps the counter dry: Search wide-mouth funnels on Amazon (Amazon, affiliate link) opens in a new tab
Done when: every container says "Drinking Water" and the fill date in marker.
Store it cool, dark and dry, and check it twice a year
OSU's storage conditions: a dark, dry space at a steady temperature, out of direct sunlight, away from cleaning supplies, fertilizer and anything with a strong odor. Twice a year, look each container over for leaks, bulging, cloudiness, a smell you can't place or a new crease. A seasonal emergency kit update is a natural time for it.
Done when: the check is on the calendar, not just in your head.
Read the bleach bottle first
Never use scented, splashless, color-safe or cleaner-added bleach, and never mix bleach with other cleaners. Many bottles now print 6% or 8.25% instead of 5.25%, so match the strength before you measure.
How much water to store, and why that decides your containers
Ready.gov's planning figure for a short outage is at least one gallon of water per person per day for several days, for drinking and sanitation, and more if you have room. For a two-week plan, OSU gives a working number: 14 gallons per person and pet.
Per person, two weeks is two 7-gallon camping-style containers, 14 one-gallon jugs, 27 two-liter bottles or 53 one-liter bottles — and a gallon of water weighs 8.3 pounds.
A household of four planning two weeks at 14 gallons per person is 56 gallons. In two-liter bottles that's 108 bottles to collect, clean, fill, label and store, weighing about 465 pounds — nothing you move once it's full. That arithmetic is the argument for two or three larger food-grade containers plus a handful of bottles for carrying and for the kitchen.
Sizes, storage spots and rotation are in emergency water storage, and how to choose water storage containers goes through jugs, buckets and barrels one by one. If you're collecting bottles because your well pump quits when the power does, does a power outage affect water covers the first three days.
What to buy instead, and what this page won't do
You probably need less than you think. The purchase worth making is a container built to hold water: a food-grade, heavy-duty bucket, carboy or drum stamped PETE or HDPE, with a lid that seals. Two 30-gallon food-grade drums hold about 60 gallons, which covers a household of four at OSU's 14 gallons a person with a little to spare. Buy the one whose maker's food-use statement you can actually read, and keep that paperwork with it. The rest of the list is small: a wide-mouth funnel, a marker and a bottle brush.
Search food-grade water storage containers on Amazon (Amazon, affiliate link) opens in a new tab
Why there's no container pick on this page
We don't name a best jug, because we haven't bought or tested one, and a guide that pretends otherwise is a sales page. The site earns, if at all, from labeled Amazon search links like the one above and clearly marked affiliate links on review pages. The canning guides follow tested USDA and National Center for Home Food Preservation methods — pressure canning low-acid foods at the times and pressures those sources publish, adjusted for altitude — and nothing here recommends oven canning, open-kettle processing, inversion seals or other untested shortcuts. No food-safety professional reviews these guides, as how we write explains, and every page lists its sources so you can open them yourself.
If your water system comes under a notice, the rules change: what to boil, bottle and skip walks through what to do with the water you already have stored.
If something goes wrong
- If a stored container smells or tastes off when you open it
- Dump it. Wash and sanitize the container again with the steps above, then refill from a source you trust. Don't drink an unexplained smell to confirm it.
- If a bottle has gone cloudy, creased, brittle or bulging
- Retire it. That's the wall telling you it's done, and a leak in a closet is worse than one container fewer.
- If you can't remember what a container held
- It isn't a drinking-water container — garden, garage or recycling, whatever the code on the bottom says.
- If your tap water comes under a boil water advisory after you filled
- The stored water is still good; the tap isn't. Switch drinking, ice, brushing teeth and cooking to the stored water and follow the notice.
When to get help
Call for help if
- Anyone gets stomach cramps, vomiting or diarrhea after drinking stored water: contact a health care provider, or call 911 if it's serious.
- A carbon monoxide alarm sounds while you're boiling water on a camp stove, grill or outdoor burner: get everyone outside first, then call 911 from outdoors. Boil and cook outdoors only — never in a kitchen, garage, basement or crawl space, never in a garage even with the door open, and keep the burner at least 20 feet from doors, windows and vents (CDC).
- Your well was flooded, or the casing or pump was damaged: contact your local or state health department or an agricultural extension agent for advice on testing and disinfecting after the water recedes (FDA).
- The notice for your water system says not to use the water for anything: follow it exactly and call the number on the notice before you use a drop.
Who to ask. In an emergency, call 911. If a carbon monoxide alarm sounds or anyone feels dizzy, sick or confused, get everyone outside into fresh air first, then call 911. Report outages and downed power lines to your utility. For local hazards, shelters and alerts, contact your city or county emergency management office (start at Ready.gov).
Frequently asked questions
Can I reuse milk jugs to store water for the garden or the car?
Yes, as long as nobody drinks from them. Watering cans, rinsing muddy tools, soapy water for a shop job and scooping potting soil all suit a jug on its way out. Cut the top off and it becomes a scoop no one will mistake for a drink. Keep them out of the kitchen so nobody grabs the wrong jug during an outage, and recycle them when they crack.
Is it safe to reuse milk jugs for water if I sanitize them first?
Sanitizing is one step, and it doesn't fix the two problems. The plastic is designed to break down over time, so a jug can start leaking while it sits, and a thin jug with a narrow neck is hard to clean and dry completely. For stored tap water, use food-use screw-top bottles or a food-grade bucket, carboy or drum instead, cleaned and sanitized.
Are 2-liter soda bottles and juice bottles safe for storing water?
Yes, if they're cleaned and sanitized and stored cool, dark and dry. OSU Extension lists plastic soda bottles, juice bottles and water jugs among the food-use screw-top containers suitable for storing tap water in an emergency. Rotate the water on a schedule, keep the bottles out of a hot garage, and retire any bottle that's creased, cloudy or leaking.
What about codes 4, 5 and 7 on other containers around the house?
The cited guidance names only PETE and HDPE for larger water containers, so those other codes come down to two questions: was the container made for food, and what has been in it since? A food-use container with a known history can be cleaned and sanitized. Anything that held cleaner, oil, pesticide or something you can't name is out, because plastic absorbs what it holds.
How many bottles do I need for two weeks?
OSU puts a two-week plan at 14 gallons per person and pet — that's 27 two-liter bottles or 14 one-gallon jugs per person, and a gallon weighs 8.3 pounds. Most households do better with a couple of larger food-grade containers and a small set of bottles for carrying and kitchen use, rather than a recycling bin full of singles.
Ready to compare?
The same searches, in one place. Use the checklist in this guide when you compare listings, and buy only what fills a gap in what you already have.
Sources
- Survival Basics: Water, Oregon State University Extension Service (accessed November 2, 2026).
- Soda bottles for emergency water storage?, Oregon State University Extension Service (accessed November 2, 2026).
- Water, Ready.gov, FEMA (accessed November 2, 2026).
- Food and Water Safety During Power Outages and Floods, U.S. Food and Drug Administration (accessed November 2, 2026).
- Emergency Disinfection of Drinking Water, U.S. Environmental Protection Agency (accessed November 2, 2026).
Water storage, in the right order
The Food and Water section puts containers, treatment and rotation in order, so you can fill a shelf once and stop second-guessing it.