PROBLEM TO BE SOLVED: To provide a souvenir composition having an effect of being familiar to the body with a moderate warmth, maintaining the warmth for a long time, being close to the user's thoughts, evoking memory, healing, and giving a feeling of well-being for a while. Provide souvenirs and how to use them. SOLUTION: A souvenir composition is wrapped in a water permeable material 2 and stored in a non-permeable bag 4 which can be sealed by a sealing portion (zipper) 3, and the non-water permeable bag 4 is outside. It is in bag 6. Souvenir compositions include sodium chloride and one or more waste-derived, naturally-derived or animal-derived materials. In addition, it can be used as a model by adding starch paste, or it can be used as a thermal warmer by spraying 0.5 to 5% by weight of water evenly with respect to the total weight. [Selection diagram] FIG. 4
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