In recent years Driessens & Verstappen have collected and copied rejected products of three types of vegetables: potato, carrot and pepper. This has resulted in three so called Morphotheques. Each Morphotheque conserves the rejected products with a focus on the form-diversity of a crop that the food industry is trying to standardize.
Morphotheque #8 (1994) is a collection of 28 copies of potatoes (cultivar 'jaerla'), executed in painted aluminum. Morphotheque #9 (1997) consists 32 copies of carrots and Morphotheque #15 (2011) of 27 peppers (green, red and yellow bell pepper), both executed in painted plaster.