Set your slow cooker on to it its LOW setting.
Pour all of the cider into the slow cooker pot.
Add the halved orange, star anise, cinnamon sticks, tea bags and stir.
Place the lid onto the the slow cooker and leave for 3 hours, stirring occasionally.
Strain the cider through a sieve to remove any unwanted bits (or scoop them out).
Stir in the brandy or rum (see notes).
To serve, ladle into heat proof glasses or mugs (or leave to stay warm in the slow cooker), add a cinnamon stick, a large slice of orange, and 2 star anise to each glass.
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