Upon receiving your Dashi Packs, we strongly recommend you to keep it in the chiller to prolong its shelf-life. It can typically last several months in the chiller in our sealed zip pouch. Dashi Packs are to be stored at an ideal temp. of 2-7 °C. Once opened, Dashi Packs can be stored in the chiller for up to 3 months. Note: Please ensure the packets do not come into contact with water to maintain freshness. Always keep the zip pouch sealed.