Compatibility: Specifically designed for Yumbox Tapas 4-compartment exterior boxes. Not compatible with other Yumbox sizes or models. Usage: Ideal as an extra tray for meal prepping with your Yumbox Tapas. Perfect for packing meals ahead of time and keeping food fresh. Note: This tray is sold separately and is interchangeable with the 4-compartment tray using the Yumbox Tapas exterior box only. Ideal Addition: A perfect addition to your Yumbox Tapas Collection!