Storage & shelf life
How Long Do Capers Last After Opening?
Opened capers keep for several weeks in the refrigerator, provided they stay fully submerged in their own brine with the jar sealed between uses — the salt and acidity of the brine is what's doing the preserving, not the passage of time on its own. Once capers are lifted out of the liquid and left exposed to air, they degrade far faster than the same jar kept properly topped up and closed. Caper from Lio Food ships in 300 g and 360 g glass, so a case naturally lends itself to keeping one working jar in the fridge at a time rather than opening several at once.
Jarred artichoke hearts follow the same basic rule — submersion and refrigeration are what keep both products stable after opening — though artichokes are generally the more perishable of the two once exposed to air, since capers benefit from a higher salt-and-acid environment that artichokes don't share to the same degree.
Keep them submerged — that's the whole rule
Capers preserved in brine stay food-safe and flavourful for weeks after opening as long as the liquid fully covers them and the jar goes back in the fridge with the lid on between uses. The brine is doing real preservation work — its salt and acidity slow bacterial growth and keep the buds from drying out or oxidizing. A caper that's been fished out and left sitting on a cutting board or in a small bowl at room temperature for a service shift is fine to use that day, but shouldn't go back into the main jar afterward.
If a jar's brine level has dropped below the capers — through repeated spooning out with a wet utensil, for instance — topping it up with a light brine (water, salt and a little vinegar) rather than leaving buds exposed to air is the practical fix.
Do jarred artichoke hearts keep the same way?
Yes, the same submersion principle applies to Artichoke hearts and bottoms in glass — keep them under their packing liquid, refrigerated, lid sealed between uses — but plan for a shorter usable window than capers, generally days rather than weeks, since artichoke's packing liquid isn't as concentrated a preservative as caper brine. A kitchen going through a 1300 g jar steadily won't notice the difference, but one buying ahead should treat an opened jar as a near-term ingredient, not a pantry stock item.
Spoilage signs to watch for
A cloudy or noticeably discoloured brine, a sour smell beyond the normal sharp vinegar-and-salt tang, or any visible mould on the surface or the lid rim are the signals to discard a jar rather than keep using it. Capers and artichokes that have dried out from sitting above the brine line will look shrivelled and darker at the edges — not dangerous on their own necessarily, but a clear sign that liquid level wasn't maintained and quality has already dropped.
For a wider look at how brine handling affects olives, capers and pickled vegetables across a kitchen, see how olives last once opened and how brine should be handled — the submersion principle carries across most of this category.
Buying formats for busy vs. occasional use
A kitchen using capers daily — on a Mediterranean menu, in a tapenade or a caper-butter sauce — gets more value from working through a case at a steady clip than from any storage trick, since fresh brine and frequent turnover beat even careful fridge management. For kitchens with lighter, less frequent caper use, do you sell capers in 4L foodservice tubs? covers case-count scaling as an alternative to opening a large-format container that then sits half-used for weeks, and do you sell artichoke hearts in glass jars? covers the stocked artichoke format and case size for planning ahead.
Related questions
Can you freeze capers to extend their life?
It's not the usual approach — capers are inexpensive to keep turning over relative to a case, and freezing changes their texture, softening the buds. Refrigerated storage submerged in brine is the simpler and more reliable method.
Do capers need to be rinsed before storing them again?
No rinsing is needed for storage — leave capers in their original brine. Rinsing is a serving-time step some cooks use to soften the salt hit in a dish, covered separately in our note on whether to rinse capers before using them.
Is it normal for caper brine to look slightly cloudy?
A little cloudiness from salt or natural sediment can be normal, but a brine that's turned visibly murky, discoloured or has developed an off smell is a sign to discard the jar rather than a cosmetic quirk to ignore.