Natural, lightweight and highly renewable, cork makes an excellent product design material. The Cortica coffee mug makes smart use of the wood, which acts to house a 12oz porcelain mug while also keeping your coffee warm.
From designer Robert Knox:
I’ve been building houses, furniture, and longboards for years. Recently, I started building my own fly rods and working with cork. I realized that cork was the perfect material to insulate and protect a porcelain mug. Cork is a great product because it insulates to keep the coffee or tea hot, serves as a built-in coaster so you never have to worry about harming your furniture, and is impact resistant.