Not sure if my dealer has made a mistake, but i bought 5 litres for £12.50 +VAT.
When he gave me the price, i asked if that was for one litre.
It was definitely 5 litreS pre-mixed FL22 in a genuine mazda container.
I bought 2 as i'm due a coolant change in a few months.
Part No C050CL0054X5L