This award-winning design goes from a flat sheet to a sturdy colander in one easy movement. Simply hold the two handles, push toward each other & the flat sheet will automatically fold, creating a base & four sides. Clips at either end then engage & lock, forming the colander. To flatten, simply pop out the four locking clips & open out. Made from dishwasher safe polypropylene, the design uses twelve living hinges to achieve its transformation.