Escanciar: the Asturian long pour

The bottle is raised in one hand above and slightly behind the head, held near its base. The glass is held in the other hand at hip level, tilted so that the falling stream lands on the inner wall rather than on the surface of the liquid already in it. The pourer looks outward rather than at the glass — sighting the stream is a matter of practice, not of watching — and the stream is cut off sharply after a short pour by returning the bottle to the vertical.

The quantity delivered is small: a couple of fingers in the bottom of a wide, thin-walled glass, conventionally called a culín or culete. A standard 70 cl bottle yields several such measures, which is why a group works through bottles rather than glasses.

The pour is aimed at the wall of the glass for a reason. A stream striking the glass shears and spreads; a stream falling into standing liquid mostly plunges. The wall impact is what produces the fine, even foam that Asturian drinkers judge the pour by.

Sidra natural is fermented dry and bottled still, but it is not gas-free. It carries dissolved carbon dioxide from fermentation at a level far below that of a sparkling cider — enough to be in solution, not enough to form a head on its own. Left in a glass it does nothing at all.

Agitating and shearing a supersaturated liquid supplies exactly what dissolved gas needs in order to leave solution: surface, turbulence and nucleation opportunity. The falling stream, the impact and the splash together drop a large quantity of dissolved carbon dioxide out of solution in under a second, producing the transient bubble and the momentary head. That effervescence begins collapsing immediately, and within perhaps half a minute the cider in the glass is flat again.

The same turbulence does a second job. Aroma compounds — esters, higher alcohols and the rest of the volatile fraction — leave a liquid at its surface, and the pour momentarily creates an enormous amount of surface. The result is a burst of aroma above the glass and a change in how the cider reads on the palate for the few seconds afterwards. Asturian drinkers describe this as the cider being briefly awake, and the technical description is not different in substance.

A third and less-discussed effect is mechanical rather than chemical. Vigorous aeration of a still, unfiltered, relatively soft cider blunts the impression of acidity slightly and lifts the texture, which is part of why a poured culín and a glass of the same cider poured gently taste noticeably different.

Because the effect is measured in seconds, the measure is small and the drinking is immediate. A culín is poured, handed over or picked up, and drunk in one. Holding it, sipping it or setting it down defeats the entire operation, and doing so marks the drinker as not understanding what has just been done for them.

The last mouthful is not drunk. It is thrown to the floor or into the trough at the foot of the bar. This serves a specific purpose in the traditional service, where one glass circulates among a group: the discarded remainder rinses the rim before the glass passes on. The wet floor of a sidrería is a direct consequence of this and is not a sign of a disorderly room.

The pourer serves others rather than themselves, and there is an order to it. Where a member of staff pours, they attend the table and the drinkers take the glass as it is filled. Where the group pours for itself, the bottle circulates and whoever holds it serves. Neither arrangement involves anybody pouring their own and drinking it.

Devices that deliver the same falling stream from a fixed height are now widely installed in Asturian establishments. A bottle is placed in the machine, a button is pressed, and a measured stream is delivered into a glass at the correct distance and angle. The physics is identical; the labour is not.

Opinion within Asturias is genuinely divided. The case for the machine is consistency, speed and the reduction of spillage and waste. The case against is that the pour is a social act performed by a person for other people, and that mechanising it removes what the custom was, leaving only what it does. Both positions are held by people with a long relationship to the drink and neither is a tourist opinion.

CiderHQ records the disagreement rather than resolving it. What can be stated flatly is that the machine changes nothing about the cider and everything about the transaction, and that this is the axis on which the argument actually turns.