Generally speaking 24 hours, chilled preservation temperature is 0 - 2 degrees Celsius, foam box insulation is not very good, far from 3 degrees Celsius within the temperature control. Once the temperature exceeds 4 degrees Celsius, the preservation time of seafood will be rapidly shortened.

So if you put enough crushed ice or frozen ice gel inside, then you can barely maintain a professional freshness temperature for 24 hours, and if you want to store it longer, the foam box itself needs to be put into a cold room.

If the outside temperature is normal - about 22 degrees Celsius, the foam box and put enough crushed ice, seafood in the foam box can be saved for 1-3 days, can be saved, does not mean that the high quality of preservation, as if so and so seafood can be eaten, does not mean that it is delicious.

Extended information:

Crab has a high content of protein, dead crab and overnight crab in the protein will be broken down into histamine and lead to allergic reactions, that is, vomiting and diarrhea, or itchy bags and even edema.

The crab's body surface, gills and gastrointestinal tract are full of pathogens such as bacteria, viruses and even parasites. Therefore, when eating crabs, you must get rid of the crab gills, crab intestines, crab heart (commonly known as the hexagonal plate) and crab stomach (i.e., the triangular bony bag with sediment inside). Especially drunken crabs, these disease-causing substances are still alive, more can not eat.

Baidu Encyclopedia - Crabs