Wine skin size

How many goblets of wine would fit in a wine skin?

A typical wineskin in AD&D or medieval fantasy settings:

• Holds about 1 quart (sometimes 2 pints) of liquid.
• A standard goblet of wine (like a small glass) holds about 4 to 6 ounces.
• 1 quart = About 38.4 fluid ounces (UK measure).
• One goblet = 5 ounces (average between 4–6 ounces),
• UK measure, 38 ÷ 5 ≈ 7–8 goblets per wineskin.

Conclusion:
A wineskin would usually hold about 7 to 8 goblets of wine. Therefore the cost of a refill is about 2sp