Furniture Design Piilo Multifunctional Stool by Hanna Lantto Piilo is a stool which hides a storage space inside its seat, making it suitable for different spaces and needs. It can be a spare stool in the kitchen, an entrance hall seat, a sofa side table or a bedside table, simultaneously storing and hiding small objects inside it. Light birch combined with bold colors and a simple form give the stool its identity.