Fresh colostrum can be refrigerated without degrading the proteins for up to seven days. Do not leave colostrum at room temperature. Bacteria double every 20 minutes in colostrum. When you do refrigerate colostrum the fridge should be between 1°C to 2°C. When cooling down a larger amount of colostrum you can add ice packs in the colostrum to cool the colostrum down quicker. It is recommended that colostrum be refrigerated in 2 liter containers.