Sago Nougat, a dessert containing small balls of coconut milk and tapioca starch, can be kept in the refrigerator for at least three days if prepared and stored properly. However, please note the following:

1. Sugar and additives in sago desserts can lead to proliferation of bacteria, so it is important to keep the food fresh through proper packaging.

2. During the processing of Sago Dew, it is necessary to add a small amount of ingredients such as edible gelatin or hanging noodles to improve its solidification. These auxiliary ingredients may affect the storage time of the food, so judgment should be made according to the actual situation.

3. Before placing in the refrigerator, allow the sago pudding to cool down sufficiently before serving in an airtight container and store at a temperature of up to 4℃ or below. If there is no any odor or spoilage, the sago pudding should be safe within three days. If you want to extend the shelf life even further, consider storing the sago pudding in the freezer at temperatures below -18°C and make sure that its packaging is intact, as this will keep it at optimum freshness for a longer period of time.

In short, to avoid problems such as food spoilage and bacterial growth, it is recommended to make and store sago pudding with proper control of shelf life and try to consume it within three days.