Customize your modular Shelpotai library with accessories designed for your every need and made from certified cardboard. Drop-down door - A simple solution for storing items you don't want to leave in plain sight. For 40x40 cm module. Bottle cross - Ideal for your wine collection to always have at hand. For 40x40 cm module. Shelf - With this accessory, you divide the module in height and multiply the support surfaces. For 40x40 cm module. Pet bed - With this accessory, you can easily create a comfortable environment for small dogs and cats. For 40x40 cm module.