Stackable Bento Box. Modern and Compact Design. Features a space saving stackable attribute to present a simple, crisp, modern look. Excellent for portion control and balancing meals. Not intended for large portion meals. Made with high quality food safe materials: food grade PP, silicone, ABS, and are BPA FREE. Extremely easy to wash and store away. Freezer safe, dishwasher safe, microwave safe. When microwaving with inner lid, please open ventilation plug. The airtight silicone sealing ring o. 7.5" L x 5" W