This is a generic stackable dry box/tray for X1/P1 printers. Its main features are:

• It aims to be less flimsy than other similar models I have found. It's designed with 4mm thickness
• It's bigger than other models, taking advantage of the most of the X1/P1 printing surface. The external dimensions are 23x23x40cm
• It's stackable, so you can, theoretically, dry multiple items at once
• Its holes are intentionally bigger than other models, to allow for more air to flow between multiple stackable boxes
• Has smoothed hard edges, making it not only easier to print, but also easier to handle

Its purpose is to be used as generic dryer taking advantage of the X1/P1 functionality. It's not just for desiccant-filled bags.