So you go down to your local winery and ask for two white and two red, please nicely (in pigeon Italian) and this nice lady takes you over to the petrol pumps.
She then takes 4 five litre glass bottles, inserts nozzle and starts pump
While this is going on, you watch the numbers whizz round, just like you would do at a petrol station
The bill for 10 litres of delicious white wine? 10 euros and 8 cents.