What is the inner dish volume? Follow The inner dish can fit up to 31.25oz or about 500-600 grams of food. Articles in this section Where can I get spare parts? Can it heat while being plugged in without battery charge left? Does the HeatsBox GO work without App? How does the timer work? Do I need my phone nearby? How much food fits into the box? Is the HeatsBox GO battery-powered? Fact sheet Will it shut off automatically when not using an app? Can the app be used with the HeatsBox Go while in airplane mode on an airplane? Am I able to purchase a HeatsBox Go with the appropriate charging adaptor for the location to which I will be traveling? See more