Can I Reuse a Pasta Sauce or Pickle Jar for Canning?
No. HealthLink BC's home canning guidance names this specifically: do not use commercial jars, such as empty peanut butter jars, for home canning, because commercial jars are not strong enough to be safely used. That covers pasta sauce jars, pickle jars, salsa jars, jam jars and anything else that arrived from a shop with food already in it. The glass is made to survive one commercial filling and the trip home, not repeated thermal shock in a canner, and the rim is not made to the tolerance a two-piece canning lid seals against. There is also no lid that fits it properly, because the lid that came with it was single use and was never designed to form a home canning vacuum. Use jars made for home canning instead, which HealthLink BC says can be used many times as long as the rims are perfectly smooth with no scratches or cracks. Store-bought jars are still useful for refrigerator pickles, dry storage, freezing without the shoulder, and leftovers.
No. HealthLink BC’s home canning guidance names this practice specifically:
Do not use commercial jars, such as empty peanut butter jars, for home canning. Commercial jars are not strong enough to be safely used.
That covers pasta sauce jars, pickle jars, salsa jars, store-bought jam jars — anything that arrived from a shop with food already in it.
Why a published authority answers this and we don’t have to reason about it
Most equipment questions on this site come with a “it depends.” This one does not, and that is worth saying plainly: a Canadian provincial health authority names the exact thing you are holding.
That matters because the reasoning people apply to this question is usually sound and still lands in the wrong place. It’s glass. It came with food in it. It has a metal lid. It looks like a Mason jar. All true, and none of it is what the jar was engineered for.
What is actually different
| A home canning jar | A commercial food jar | |
|---|---|---|
| Built for | Repeated heating and cooling, many seasons | One filling on a production line, then the trip home |
| The rim | Manufactured to the tolerance a two-piece lid seals against | Made for the closure it shipped with |
| The lid | Replaceable, single-use, sold to a standard | Single-use, no replacement made, not a canning lid |
| Reuse | Many times, if the rim is perfectly smooth | Not for canning |
The two failures are separate, and the second is the one that matters. Glass breaking in a canner is a ruined batch and a burn risk — bad, but obvious when it happens. A seal that never formed properly is not obvious. It sits on a shelf looking exactly like a sealed jar.
What we are not going to tell you
We cannot tell you that a particular jar will fail, and that is not the standard anyway. Plenty of people have reused a pasta sauce jar and had nothing go wrong. The guidance is a category rule precisely because you cannot inspect your way to the answer — the difference is in how the glass was made and to what tolerance the rim was finished, and neither is visible.
What we can tell you is that no Canadian authority endorses the practice, and one names it as something not to do. On this site that settles it. See how we source.
The lid is a separate problem, and it has no solution
Even setting the glass aside, there is nothing to seal it with.
- The original lid is single use. It was shaped by the factory closure and by being opened once.
- A two-piece canning lid does not fit it. Bernardin lids come in the two standard mouth sizes; a commercial jar’s thread and rim are its own.
- Tight is not sealed. A lid that screws down firmly and holds no vacuum looks identical on a shelf to one that sealed properly.
HealthLink BC makes the same point about canning lids themselves — a perfect fit can no longer be guaranteed after a lid has been pried off once — which is covered in reusing SNAP lids.
Your Mason jars, though, are reusable
The contrast is the useful part of this page. HealthLink BC:
However, the jars can be used many times, as long as the rims are perfectly smooth and there are no scratches or cracks that would prevent a seal.
So the ongoing cost of home canning is lids, not jars. Run a fingertip around each rim before you fill it; a nick you can feel is a jar to retire from canning. Cracked and chipped jars covers what to look for.
What store-bought jars are genuinely good for
Don’t throw them out — just keep them off the processing shelf.
- Refrigerator pickles and quick brines. Fridge, eaten within days, never processed.
- Dry pantry storage. Both HealthLink BC and Québec make the point that dry goods want airtight containers.
- Freezing — if the jar is straight-sided rather than shouldered, and you leave headspace. The shoulder is where jars crack; see wide-mouth vs regular-mouth.
- Leftovers, cold infusions, dried herbs, screws and nails.
Related
- Can you reuse Bernardin SNAP lids? — the lids are single use; the jars are not
- Can you can with cracked or chipped jars? — checking a rim you intend to seal against
- Bernardin vs Mason vs Kerr jars — which purpose-made jars interchange
- How to tell if home-canned food has gone bad — the inspection routine
If anyone has eaten from a jar you now doubt and develops double or blurred vision, drooping eyelids, slurred speech, difficulty swallowing, a dry mouth or muscle weakness — call 911 or go to an emergency department immediately. Botulism antitoxin works best given early. Do not wait to see whether it passes.
Altitude adjustment
Process times in a boiling-water canner are written for altitudes up to 305 m. Above that, water boils below 100 °C and the time printed in the recipe is no longer enough. Find your elevation, then add the minutes Bernardin publishes for that band.
| Elevation (m) | Elevation (ft) | Add to processing time |
|---|---|---|
| 0 – 305 | 0 – 1,000 | None — use the recipe time as written |
| 306 – 915 | 1,001 – 3,000 | +5 minutes |
| 916 – 1,830 | 3,001 – 6,000 | +10 minutes |
| 1,831 – 2,440 | 6,001 – 8,000 | +15 minutes |
| 2,441 – 3,050 | 8,000 – 10,000 | +20 minutes |
On the line between two bands, round up to the higher one. Slightly over-processing is safe; under-processing is not.
Bernardin’s published tables stop at 3,050 m.
Find your Canadian city · Full altitude guide
Figures from Bernardin, “How do I can at a high altitude?” (bernardin.ca). Confirm against your own Bernardin edition before you start — a book edition and the website can differ.
Frequently asked questions
Is this an actual rule, or just what canning people prefer?
It is published guidance, not a preference. HealthLink BC File #22 says it in one sentence: do not use commercial jars, such as empty peanut butter jars, for home canning, because commercial jars are not strong enough to be safely used. That is a provincial health authority naming the practice specifically, which is why this page can give you a flat answer instead of a discussion.
Some store-bought jars look identical to Mason jars. Aren't they the same?
Looking similar is not the same as being made to the same specification. A jar made for home canning is built for repeated thermal cycling and its rim is manufactured to the tolerance a two-piece lid seals against. A commercial jar is built to survive one filling on a production line and the trip home. You cannot tell the difference by eye, which is exactly why the guidance is written as a category rule rather than a judgement call.
What actually goes wrong?
Two separate failures. The glass can break under thermal shock or in a canner, which is a burn and a lost batch rather than a food safety question. The seal is the part that matters more: a commercial rim was not made to seal against a home canning lid, and a seal that looks fine but is not properly formed is how food ends up stored at room temperature without a reliable barrier. We cannot tell you which of those will happen with any given jar, which is the point of not starting.
What if the original lid still screws on tightly?
Tight is not the same as sealed. The lids that arrive on commercial jars are single use — the sealing compound is shaped by the factory closure and by being opened once. HealthLink BC says the same about home canning lids for the same reason: a perfect fit can no longer be guaranteed after a lid has been pried off once. A jar that screws shut firmly and holds no vacuum will sit on a shelf looking exactly like a sealed one.
So what are these jars good for?
Quite a lot, none of it shelf storage. Refrigerator pickles and quick brines that live in the fridge and get eaten within days. Dry goods in the pantry — HealthLink BC and Québec both make the point that dry goods want airtight containers. Freezing, if the jar is straight-sided rather than shouldered and you leave headspace. Leftovers, cold infusions, storing dried herbs, holding hardware. The rule is only about processed jars meant to sit at room temperature.
Can I at least reuse my own Mason jars?
Yes, and this is the useful contrast. HealthLink BC says the jars can be used many times, as long as the rims are perfectly smooth and there are no scratches or cracks that would prevent a seal. Run a fingertip round the rim each time. The lids are the part that is single use, not the jar.
Sources
- HealthLink BC — Home canning: How to avoid botulism, File #22 (https://www.healthlinkbc.ca/healthlinkbc-files/home-canning-how-avoid-botulism)
- Québec — Home canning: Preparation and prevention (https://www.quebec.ca/en/health/nutrition/food-safety-risk-prevention/food-safety/preparing-cooking-food-safely/home-canning)
- Public Health Ontario — Home canning: literature review, 2014 (https://www.publichealthontario.ca/-/media/documents/h/2014/home-canning.pdf)
- Bernardin Home Canning — Home canning FAQ (https://www.bernardin.ca/en/how-to-can/faq.htm)