Ruutu Vases by Erwan and Ronan Bouroullec for Iittala 

Though simple in form, creating these diamond-shape vessels in an array of delicate, watercolor-like hues in glass requires exacting precision.  Photo 2 of 4 in Designing for the Five Senses: The Key to Mastering Color by Aileen Kwun

Designing for the Five Senses: The Key to Mastering Color

2 of 4

Ruutu Vases by Erwan and Ronan Bouroullec for Iittala

Though simple in form, creating these diamond-shape vessels in an array of delicate, watercolor-like hues in glass requires exacting precision.