These thermal servers feature a pour-through lid with a lever actuated opening, so they keep the heat in until you're ready to pour. The server's opening is designed to work well with the V60 Dripper.
When preheated with hot water, this 550 mL carafe (750 mL for the larger size) can keep a fresh brew hot for up to 90 minutes.
PROTIP: To keep a fresh brew hot for up to 90 minutes, preheat your server with hot water. We tested this and our data showed that a fresh brew was still hovering around 160° F at 60 minutes, and 140° F at 120 minutes.