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Confidence votes 22.7K. One Answer If you keep it in the cardboard containers that the Chinese restaurants give you about 4 days, if placed in Tupperware containers then 7-10 days. Another Answer For best quality, leftover Chinese Restaurant food should be eaten the next day.
The USDA recommends only storing mayonnaise in the refrigerator. From the same page: Perishable food should not be left out more than 2 hours at room temperature (1 hour when the temperature is above 90 Â°F, 32.2 Â°C).From what I understand, it doesn't last in the backcountry.p vote 3 down vote. Perishable food should not be left out more than 2 hours at room temperature (1 hour when the temperature is above 90 Â°F, 32.2 Â°C). From what I understand, it doesn't last in the backcountry. The recommended shelf-life for commercial mayonnaise, opened and inside the refrigerator, is two months.