3-5 days. According to public information, manufacturers will put ice packs in the packaging of cakes. In the spring and summer when the temperature is low, the frozen products of ice packs generally will not be broken for more than five days. However, in the summer and autumn when the temperature is high, it is best not to express frozen products for more than 3 days. Generally, there is a risk of deterioration after more than 5 days.