This will be shipped after opening (Yu-Packet Post). This is a listing for Otsuka Pharmaceutical Factory's Oral Rehydration Solution OS-1, OS-1 Powder, powder type, 30g (for 1L) x 7 bags x 2 boxes. The expiration date is July 24, 2026. I am listing them as a set of two for a lower price. How about for heatstroke prevention in midsummer? Suitable for replenishing and maintaining water and electrolytes for those with mild to moderate dehydration. Suitable for dehydration associated with infectious enteritis, diarrhea, vomiting, and fever due to the common cold, insufficient oral intake in the elderly, and excessive sweating. Stored at home. Unopened, but please consider before buying if you are particular about product condition. Thank you for your consideration.