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Short answers:
- Overnight (next day) it is definitely fine - see citation below.
- I personally drink a room-temperature pot across 4-days (black only) with no problem,
and I know my parents and their parents did the same.
Black coffee is acidic, and highly acidic foods last a very long time without refrigeration (for example, a bottle of vinegar has no expiration date).
Coffee *will* eventually grow mold, but it takes a few days. If it has cream or sugar however, I would only trust it same-day.
When I web-searched this question I found 95% useless answers like "no more than 4 hours" which is silly, and coffee-geeks who will say "after 20 minutes it loses its flavor".
The only educated answer I could find anywhere was from Science News:
http://www.redorbit.com/news/science/204274/when_does_good_food_go_bad/index.html
where two professors comment (quoting):
True or false: You can leave coffee in the pot and drink it the next day.
True. Coffee will eventually grow surface mold but usually not in one day, says Donald W. Schaffner, extension specialist in food science and professor at Rutgers.
It's drinkable, but it won't taste as fresh because the compounds that form coffee's characteristic aroma and flavor evaporate at room temperature, says Purnendu C. Vasavada, professor of food science and microbiology at the University of Wisconsin-River Falls. Refrigerating helps coffee keep its flavor fresher the next day.
What else can I help you with?
How long is coffee good for after it has been brewed?
Coffee is generally good for up to 12 hours after it has been brewed, but its taste and quality may start to decline after that time.
How long can you store brewed coffee in the fridge?
Brewed coffee can be stored in the fridge for 1-2 weeks before it starts to lose its freshness and flavor. It is best to store it in an airtight container to prevent it from absorbing other odors in the fridge. Reheating it before consumption is recommended for the best taste.
How long can brewed coffee sit out?
It depends on your preference. If you don't mind drinking mud, then it can sit out for a month. If you take good coffee seriously then drink it within the hour!
How long does coffee stay hot after it is brewed?
Coffee typically stays hot for about 30 minutes to an hour after it is brewed, depending on the type of container it is stored in and the surrounding temperature.
Why is diner coffee so good compared to other types of coffee?
Diner coffee is often considered good because it is brewed in large quantities and kept hot for a long time, which can enhance the flavor. Additionally, the simplicity of diner coffee and its consistent taste can be comforting and familiar to many people.
Is day-old coffee safe to drink?
Yes, day-old coffee is generally safe to drink as long as it has been stored properly and reheated to a safe temperature before consuming. However, the taste and quality may not be as good as freshly brewed coffee.
How can I prevent my brewed coffee from freezing in cold temperatures?
To prevent brewed coffee from freezing in cold temperatures, store it in an insulated container or thermos to maintain its temperature. Avoid leaving it exposed to the cold for long periods of time. Additionally, consider adding a small amount of hot water to the coffee to help keep it from freezing.
How long is pork good in the fridge after thawing?
Pork is good in the fridge for 3-5 days after thawing.
How long does coffee with milk last in the fridge before it goes bad?
Coffee with milk typically lasts for about 1-2 days in the fridge before it goes bad. It is important to store it in a sealed container to maintain freshness.
Is is all right to drink overnight coffee left in fridge?
Yes as long as its refrigerated its safe to drink.
How long is breast milk good in the fridge after thawing?
Thawed breast milk is good in the fridge for up to 24 hours.
How long are scallops good for in the fridge before they spoil?
Scallops are good for about 2-3 days in the fridge before they spoil.
