SPAM Classic – Ham – Shelf Stable Protein – Single Serve – 2.5 Ounce (Pack of 24) $15.68

24 x 2.5 oz packs of SPAM for $15.68 after 15% coupon on the product page with Subscribe & Save option selected. Shipped free.
https://www.amazon.com/gp/product/B000FIZW00
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Even cheaper with 5+ subscriptions.
Ideal for hiking/backpacking.