Add the cranberries and water to a large stockpot. Bring to a boil and then turn down the heat, cover and simmer for 25 minutes.
Pass the cranberry mixture through a food mill with the smallest plate. Add agave nectar to your taste. Add the 2 juices to the bowl and stir to combine.
Set a fine-meshed sieve over a large bowl, pass the cranberry mixture through the sieve, trying to not press the solids too much (this will result in a thicker juice). Remove solids to a bowl and repeat with remaining cranberry mixture. Save solids for another use (fruit leather perhaps). Refrigerate juice and serve.
Notes
Use a blender if you don't have a food mill and pass through a sieve.
Save the solids and spread on a baking sheet lined with parchment and bake at 250ºF for around 2-3 hours, or until dry.
Tips for Storing
Store juice in a glass pitcher or mason jars for the freshest taste.
Keep refrigerated and consume within 5–7 days.
Freeze extra juice in portions for smoothies or cocktails.
Shake or stir before serving, as natural settling may occur.