You can use high-strength liquor or formalin to soak in a glass container, and then place it in the refrigerator or a cool place; or place it in the sun and ventilate it to dry. However, it is not recommended to save a cat’s balls. Cats will be sad after being neutered, so it is better not to let the cat see the cut balls. The owner can bury the balls in his own yard or community.