Like a jewel to the bottle. Carat City Stoppers is a line of bottle stoppers for your cocktail cabinet. With the inspiration from big cities around the world, the designer Lena Bergström has made abstract interpretations in cut crystal. The Carat City Stopper Oslo is inspirered by Holmenkollen skijump outside of Oslo. The stoppers have a coned bottom with rubber for a thight fit on most wineand liquor bottles.