The Oiva mug 25 cl from the Finnish brand Marimekko has a natural, roughly-hewn surface that nicely contrasts with the smoothly glazed interior. Invite your friends and family for a cup of coffee or to curl up on the sofa with a film — this mug is the perfect companion. Stoneware is a natural material, which means that some small variations in appearance can occur, making each and every piece entirely unique.