Is the plastic tray safe to cook food in? 19 June 2024 11:20 Updated Yes, the trays we use are BPA-free and have been tested to ensure they are safe. Related articles I don’t have a microwave. Can I cook all COOK meals in an oven? Can I transfer COOK food to a ceramic dish before cooking? Will the cooking time change? Can your COOK meals be reheated? Can I change what is in one of your COOK meal boxes? Is COOK food frozen?