Practical
Storage
Nothing in a sealed bottle stops changing. Storage decides how fast it changes, and in which direction — which is a question about temperature, light, oxygen and pressure rather than about a date on a label.
Three processes account for most of what happens to a cider in store. Oxidation continues wherever oxygen was dissolved at packaging or reaches the bottle through the closure, and its rate roughly doubles for every 10 °C. Light drives photochemical reactions that green and clear glass admit far more of than brown. And in a bottle-conditioned cider the yeast is still present and still viable, so warmth is not merely an accelerant but an invitation to refermentation and rising pressure.
Two of those changes are decline and one need not be. A cider that has thrown a deposit, lost a little carbonation and gained tertiary aroma has developed; a cider that has gone brown and flat-smelling has oxidised. Telling them apart is what these records are for, and where a change is a genuine fault it is described as one and linked to the fault it is.
How long it keeps
What sets the limit, and why a date on a label is a commercial statement rather than a chemical one.
How long unopened cider keeps
Keeping times vary from a few months for a light, fresh, filtered cider to many years for a tannic bottle-conditioned one, and the variables are style, alcohol, tannin, closure and storage conditions.
Does cider improve with age
Most cider does not; a minority genuinely does, and the minority is identifiable in advance by tannin, acidity, alcohol, sugar and closure rather than by price or reputation.
How long an opened bottle keeps
Opening a bottle admits oxygen and lets carbonation escape, and both start clocks: carbonation is measured in hours, flavour in days, and acetification in days to weeks.
Best-before dates and shelf life
A best-before date on cider is a quality statement made by the producer, not a safety deadline, and the labelling rules that require it exempt drinks above a certain strength altogether.
Temperature, light and where it is kept
The conditions that decide the rate of everything else.
Storage temperature
Every chemical process that ages a cider runs faster when it is warm, so the cost of a warm cupboard is measured in months of shelf life rather than in any single dramatic failure.
Light and cider
Light causes a specific, fast and irreversible fault, and the protection a bottle offers depends entirely on its glass colour: brown blocks most of the damaging wavelengths, green blocks some, clear blocks almost none.
Storing cider without a cellar
Practical arrangements for keeping cider well in an ordinary house: finding the most stable cool corner, using the packaging you already have, and knowing which common places are actively bad.
Closures, pressure and the container
What the container admits, what it holds in, and where a stored bottle stops being a quality question and becomes a safety one.
Handling pressurised bottles safely
An over-carbonated bottle stores real mechanical energy in glass, and the warning signs — bulging caps, weeping seals, gushing, cloudiness with rising pressure — are recognisable before anything fails.
Storing bag-in-box and keg
Bulk formats have shorter unopened lives than bottles because their containers are more permeable, and they are far more sensitive to warm storage than glass is.
Telling when a bottle-conditioned cider is ready
A conditioning bottle is doing a measurable thing — fermenting a known quantity of sugar into a known quantity of gas — and readiness can be judged by time, temperature, deposit and a test bottle rather than by guesswork.
Upright or on its side
Whether a bottle should lie down depends entirely on the closure: a natural cork needs contact with the liquid to stay sealed, and a crown cap or screw cap does not.
Once it is open or part-finished
A different problem entirely: the drink is now in contact with air and with whatever was on the rim.
Sediment and change in the bottle
Which changes in a stored bottle are normal, and which are the early signs of something going wrong.