4 compartments keep food separate for picky eaters and make it easy to mix and match meals and snacks. All materials are food-grade safe and 100% free of BPA, PVC, phthalates, lead, or vinyl. Easy to Clean & Microwave The food tray offers easy cleanup. Just add to the top shelf of the dishwasher. You can also reheat food in the microwave for up to 3 minutes using the tray. Hand washing is recommended for the ice pack and outer box. Bentgo Kids Chill has the ice pack built into a slim, lightweight design that fits easily into your child's backpack for hassle-free transport to school.