Combine spices and water in a medium pot. Bring to a boil. Add tea leaves and sugar. Reduce heat to medium-low and simmer for 5 minutes.
Rest a fine mesh sieve atop a funnel over clean glass mason jars (or any jars available). Pour tea through sieve, filling jars halfway. Discard any remaining solids.
Top jars off with milk. Allow to cool completely before storing in the fridge. Chai may be enjoyed cold or warmed over low heat in a small pot on the stovetop.