Korean designer Luna Seo, now based in Stockholm, Sweden, has presented a new range of seating at Ventura Lambrate in Milan. The Kal Version 2.0 stools' main design feature is that the underneath of the seat is coloured in vibrant shades of pink, blue and purple. The colours only present themselves when the stools are stacked, giving ordinary white steel stools a sense of vibrancy, in an unexpected way.