1. quality material: Our stackable storage boxes are made of quality, foodsafe plastic. The small pen storage containers with lids are from BPA and other harmful substances, offering exceptional stability and durability. Featuring snapon lids, these robust containers are longlasting and resistant to damage, making them ideal for daily use. 2. Secure closure: The stackable storage boxes come with reliable click fasteners, ensuring your items stay safely inside without falling out. The small pen storage with lids provides a practical and secure closure, for organized storage in our stackable pencil stand box set. 3. Stackable design: Thanks to the special groove design on the lids, multiple pen storage boxes can be easily stacked on of each other. The small pen storage with lids saves significant space and simplifies classification in backpacks or drawers. These clipon storage boxes for office supplies feature a tier design for space utilization. 4. Semitransparent appearance: The stackable pen storage boxes are crafted from lightweight yet durable semitransparent plastic, allowing you to instantly identify contents and quickly locate needed items. This practical feature enhances the functionality of our clear pencil storage boxes.