@Yulianto Hiu Interesting. I would think that since people would game this, if they could, that this design would act as a reminder. A reminder to take care of the food and it would be a good way to introduce other process. With that opportunity, I have a low powered inexpensive device that creates HCLO << 5 ppm at PH 6.5 from saline. This is a very short lived antimicrobial that could be part of your workflow (for leafy vegetables in particular). It is so benign to mammalian tissue that it is used as a nasal rinse yet it keeps produce fresh longer.