Place the cinnamon stick on a clean surface and gently crush it with the back of a spoon to loosen the spices, then set aside.
Add the cinnamon stick to a kettle or pot, then pour hot water over it. Cover and let steep for 8–10 minutes, allowing the cinnamon to release aroma and flavor.
Once steeping time is complete, carefully remove the cinnamon stick using tongs or a slotted spoon, inspecting for deep coloration and aroma. Place the cinnamon stick in a sieve or strainer set over your mug.
Pour the steeped cinnamon-infused water through the strainer into a mug, ensuring the strained liquid is clear and fragrant. Discard the used cinnamon stick.
Optional: garnish with a cinnamon powder sprinkle or a lemon wedge for added aroma and visual appeal. Serve immediately while warm.