Okay. We love this dripper! The cool thing about it is the ability to regulate the flow rate of your brewing process via the rotating base. You'll love it.
From their website:
The DECEMBER Coffee Dripper is an adjustable pour over coffee dripper with four levels of flow adjustment. This allows you to grind the coffee at the optimal coarseness for the best flavor that your coffee has to offer.
Here are some recommended settings, but adjust your variables to taste: 20g coffee for a single cup (300mL or 10 oz) using Stage 1 40g coffee for a double serving (600mL or 20 oz) using Stage 2 Use Stage 3 to increase flow when needed Use Stage 0 to extend the brew time by stopping the flow and resuming as desired, or to reduce dripping when your brew is complete.