The container model

Also known as: envase, kegs and bottles, per-pour cost, coste por ración, container cost, yield calculation.

For products that come in a container and are poured in portions — a 30L keg sold as half-pints and pints, a 750 ml wine bottle sold by the glass, a 700 ml spirit bottle sold as singles and doubles — brasio's container model auto-derives the per-pour cost from the container cost. You set the container size and cost once; each size on the product gets its cost calculated from there.

When to enable it

Enable the container model on any product where:

• The product comes in a fixed-size unit (a 30L keg, a 750 ml wine bottle, a 700 ml spirit bottle).
• You pour from that unit into a smaller serving size (a pint = 568 ml, a copa = 150 ml, a single = 35 ml).
• You want the per-pour cost calculated automatically rather than typed in by hand for each size.

Good fits:

• Kegged beer (35L / 30L / 20L kegs, poured as caña / tercio / pinta).
• Wines by the glass (750 ml bottles, poured as 150 ml glasses).
• Spirits (700 ml bottles, poured as 35 ml singles or 50 ml doubles).

Not the right fit:

• Bottled beer (the bottle is the serving — no division).
• Coffee, soft drinks dispensed from a tap, food.

Set it up

1. On the till, Admin → Catálogo, open the product.
2. Tick Viene en un envase que dividimos en raciones (Comes in a container we divide into portions).
3. Two fields appear:
   • Tamaño del envase (ml o unidades) — e.g. 750 for a wine bottle, 30000 for a 30L keg.
   • Coste neto del envase (€) — the supplier price for one container, net of VAT. E.g. €4.50 for a bottle of house wine, €120.00 for a 30L keg.
4. Save.

What changes for each size

In the Tamaños section, each size now shows Calculado del envase: {value}€ as the cost row. The formula is:

coste por ración = (ml de la ración / ml del envase) × coste del envase

So a 150 ml glass from a €4.50 / 750 ml bottle costs (150/750) × 4.50 = €0.90 per glass. brasio writes this into the size's coste neto € automatically.

You can still override any size's cost by typing into the field. The override sticks until you remove it.

How it feeds the GP margin

With the per-pour cost in place, the margin tooltip on each size shows the live gross-profit percentage: Margen {amount} · {gp}% GP. This is what owner/manager users see when editing or auditing prices. See Cost prices and GP margins.

Inventory: cascading containers

For wine sold by the glass and by the bottle, the container model pairs with bottle tracking: brasio knows how many bottles are in stock, how many glasses are left in the currently open bottle, and how many glasses come from a full bottle. When the open bottle's last glass is sold, brasio automatically opens the next sealed bottle. See Inventory tracking.

For kegs, the same cascade works: a 30L keg starts full, drops with each pint sold, and the fill bar on the till tracks the remaining percentage in real time.

Not working?

• The size's cost still shows the old hand-typed value: you overrode it once. Clear the coste neto € field on the size row and save — brasio re-derives from the container.
• The container ml is wrong (e.g. 30 instead of 30000 for a keg): mind your units — the field is ml or units, so a 30L keg is 30000 ml.
• GP margin tooltip is missing: check the size has both a precio € and a derived cost. With no cost, no margin.
• I want a size whose cost isn't proportional (e.g. a 'shot tasting flight'): override the size's cost field manually; the container model is a default, not a constraint.