Iittala Glassware Dining and Entertaining Tapio Champagne/Sherbet - Secrets. With elegance, ease and distinction, Tapio Wirkkala has captured and encircled an air bubble in the slightly heavy stem of the glass. Tapio is a timeless variation on traditional stemware. It represents Iittala's Golden Era of the 50's, and was one of the products that took Finnish design into the international spotlight. Tapio is highly adaptable to different moods and situations.