Thermal carafes are generally more expensive than glass carafes, but there’s a good reason behind it. Though they’re not as attractive and presentable as glass carafes, they allow several benefits that you’d miss out on if you decide to be economical. It’s obvious that a thermal carafe is able to keep your coffee hot for much longer, as it’s built with an insulating material. A glass carafe requires a hot plate in order to achieve that. Thermal carafes also slow down oxidation and preserve the flavor of the coffee for longer periods.