Big Green Egg Expansion Cabinet for Modular Nest SystemWatertight Storage Cabinet for Expanding Big Green Egg Modular Nest Setups The Expansion Cabinet for the Modular Nest System is a storage only expansion component designed to add secure, weather protected storage to an existing Big Green Egg Modular Nest configuration. It integrates directly with the EGG Frame and Expansion Frames, allowing you to extend your outdoor kitchen with enclosed storagewithout changing the structure of your original setup.