The boxes are stackable, but not nesting. There are three ways to stack them: Tower stack:Box on box stack. The base of the box acts like a lid for the one below, preventingthe dough balls contained inside from drying out. Aerated stack: When the dough requires aeration or to release part of the gas. Cross stack:After washing, air is allowed to circulate between the stacked boxes for fast andcorrect drying. 4 coloured tags to identify and manage doughs and food products. Sides with practically 90º smooth interiormaking it easy to remove the dough balls. Rounded corners for easy cleaning, without sharp corners or spaces for impurities to attach. The thickness of the unit and sidereinforcement provide added strength toguarantee durability.