Bakeware, Tableware, Drinkware and Cookware Design Qterra Craft Travel Mug by Pierre Baston Qterra Craft is a travel mug that brews coffee or tea completely by external control. The Craft carries ground coffee or tea leaves and hot water separately, starts and stops brewing on demand, and quickly cools hot beverage for safe drinking without the user's opening the mug. A yellow ring changes color to signal when cooling is done. Interchangeable decorative medallions allow the user to personalize the look of his Qterra Craft in seconds.