Designed by Oiva Toikka for Iittala, the Kastehelmi series is now a classic product line within the brand. Finnish for “dewdrop,” the Kastehelmi evolved from a technical challenge—Toikka used the glass droplets to cover joint marks left on the surface of pressed glass pieces. Although the technique originally began with functional intentions, the distinctive look made the series a popular range of glassware, inclusive of the Kastehelmi Large Plate.