- TWO HEATING METHODS: This Portable Microwave offers versatile power options, allowing you to heat meals using either a power bank or a mobile phone charger. Perfect for on-the-go dining, the lunch box is crafted from durable Oxford fabric, ensuring it remains functional even in the rain. - ALUMINUM FILM LINER: Designed with an internal aluminum film, this USB Charging Heated Food Container guarantees easy cleaning and exceptional thermal conductivity. Enjoy hot meals anytime, reducing the risk of stomach discomfort from cold food. - VEGETABLE & FRUIT PRESERVATION: The Heated Lunch Bag can be utilized without USB heating, thanks to its aluminum film liner that extends the freshness of fruits and vegetables. Ideal for outings, it keeps your produce crisp and ready to eat. - SELF-CONTAINED USB SOCKET: Measuring approximately 22 x 17.5 x 9.5 cm (8.7 x 6.9 x 3.7 in), this heating insulation bag features a built-in USB socket for convenient heating. The smooth zipper opening and secure closure ensure easy access, while the sturdy upper handle makes it lightweight and portable for daily use. Use Scenarios: 1. Enjoy a hot lunch at work by plugging the lunch box into your power bank during your commute. 2. Keep fruits and vegetables fresh while hiking or picnicking without needing an external power source. 3. Easily heat meals while traveling or camping, ensuring you have a warm dish anytime, anywhere.