Using this lunch box is easy. First, put your food in the compartments and soup in the soup bowl. If you want to keep your food warm, just add some hot water between the stainless steel and plastic layer. You can place your phone on the tableware grid while having your meal. When using the plastic shells in the microwave, make sure there are no metal parts. After each use, wash the lunch box with mild soap and warm water. Don't use abrasive cleaners as they may damage the surface. Keep it in a dry place when not in use.