iittala Kartio Tumbler set of 2 Rain 210ml. Known as the conscience of Finnish design, Kaj Franck sought to remove excess in his work leaving only the essentials. Franck realized his goal with his Kartio collection, which represents a lively balance between material and geometric form. Refined, versatile and functional, Franck believed it was what one did with his pieces that made them theirs. Kartio is a beloved symbol of Nordic design that goes beyond any trend. With the creation of the Kartio tumblers, Franck mastered the design of glassware. Durable enough for everyday while the striking design fits any table setting.