Note: This is better with 3 large lemons. If they are small I think it's a bit weak. If you have small lemons you could use 4.
Makes about 1¼ Litres
When we make this for the summer fair, one recipe will fill a 2L jugs (with a tray of ice added), or 3 recipes will fill the Colemans 3.8L cooler (with a tray of ice added).