GEL-COOL square L 500ml

Simple, standard lunch box with cold storage function The L size is perfect for everyday use; we also recommend using the S size (220ml) and onigiri case together. In 2023, the product was renewed for easier use. [Renewal points] The inner surface is coated with a patented "rakushibo" finish, making it more resistant to stains and less likely to show scratches. The outer surface has been changed from a glossy finish to a more elegant matte finish. [About GEL-COOL] GEL-COOL has a special technology to seal a refrigerant inside the lid, and the entire lid is frozen in a refrigerator. In other words, the lid becomes a refrigerant. This makes perfect sense because cold air flows from the top down. It is also easy to use. When you are done eating, simply wash it and store the lid in the freezer. When you are ready to use it, just take it out of the freezer and put the lid on the lunch box and you are good to go. Even on warm days, you can take it with you without worry. You w