In a large pot, combine the water and spices. Cover, bring to a boil and let simmer for 30 minutes. (Even with the pot covered, a good third of the water will evaporate.) Turn off the heat.
Pour liquid through a fine strainer and discard the cinnamon sticks. Rinse out the pot with hot water, pour the liquid back in.
Add the tea bags, cover and let steep for 15 minutes. Remove the tea bags.
Whisk in the milk and pumpkin puree. If serving right away, reheat the liquid but do not boil. Pour into hot mugs (see TIPS). Sweeten to taste with honey or stevia.
***If not serving right away, let cool, then transfer to a carafe and refrigerate. Re-warm to serve, sweetening to taste.
Notes
Please note that the nutrition data given here is a ballpark figure. Exact data is not possible.