[BombNullIsland]

"For example people will often say give me that liter of wine, when in fact the bottle it’s 750ml"

No one has ever said this. Ever. In the history of ever.

Wine and spirits in the US were sold as "fifths" or one fifth of a US gallon, equal to 757ml. This became a "metric fifth" or 750ml. No one is even slightly confused by this.

[unlikelymordant]

There are many countries where litre is the only unit of measurement, perhaps it happened in one of those?

[jackvalentine]

I assure you that in countries where the metric system is used ordering a litre of wine you would expect to receive 1000ml.