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How long does cold brew last?
Quick answer
Cold brew lasts 2 weeks in the refrigerator, and about 4 hours at room temperature.
| Where | Safe for |
|---|---|
| 🏠 Room temperature (counter) | 4 hours |
| 🧊 Refrigerator (≤40°F / 4°C) | 2 weeks |
| ❄️ Freezer (0°F / −18°C) | Freezing isn't recommended — it ruins the texture or isn't safe |
Good to know2 weeks refrigerated — that's the whole point of it.
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How to tell if cold brew has gone bad
Most drinks give you clear signals — smell, fizz, or separation — before they become a problem. Trust your senses before any calculator — including ours. Throw cold brew away if you notice:
- An off, sour, or unusual smell that wasn't there when fresh
- A slimy, sticky, or tacky surface texture
- Visible mould or unexpected discolouration
- It's been past the safe window in the table above
⚠️ Bacteria that cause food poisoning often produce no smell, taste, or visible change. Food can look perfectly fine and still make you sick — that's why the time limits matter even when everything seems okay.
Storage tips for cold brew
Refrigerate promptly after opening and keep lids sealed — oxidation and stray microbes are what turn opened drinks, not time alone.
Fizz loss, separation, or cloudiness are usually quality signals, not danger signs — but a sour smell in juice means fermentation has started and it's time to let it go.
Not sure about your exact situation?
Tell the checker where your cold brew has been and for how long — get an instant verdict.
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