Boat Shelter Unique by Bertil Vallien, Kosta Boda. A pure masterpiece by the glass artist Bertil Vallien. The boat or craft is sand cast and handmade in Kosta, Småland. All the details of the boat are very rich in detail and it is rare to find a boat with so much color and detail as this one. The boat has a height of 28 cm together with the scaffolding.