Iittala Kartio Tumbler Small Sand Set of 2. This glass needs little introduction. If you think you recognize it, it's because you do. Kartio is the archetypal image of a glass. Yet attempts to copy Kaj Franck's classic glasses and decanter fail because they do not acknowledge the effort needed to balance the material with strong geometric forms and colors. Durable enough for everyday use, the Kartio range features glasses, carafes and bowls all in several pure glass shades. And Kartio is balance to the millimetre. The simple shapes fit beautifully with Teema, but as classic water glasses they complement any table setting with timeless elegance.