Rabelos

Port wine was introduced in the 17th century when the import of wine into Portugal halted after Britain declared war on France and blocked ships from entering or exiting French ports. With Britain now looking to Portugal to supply wine, wines made from grapes taken from vineyards along the fertile Douro river were used. British merchants would often add "a bucket or two" of brandy to the wine barrels, leading to rich, fortified wine that was very different from French varieties.

Rabelos were famously used to transport the wine up until 1964.  Now, they're used to transport tourists and people who like to pretend to be pirates.