I have thoroughly dried used drip coffee grounds by heating them multiple times in the microwave to remove moisture. I believe this method is less prone to mold compared to sun-drying. I will ship the grounds in a zipper bag, using the maximum weight allowed for Rakuraku Mercari delivery (including the box, 1kg). Coffee grounds can be used for deodorizing and eliminating odors. Consider using them as a deodorizer for pets or diapers. I do not smoke, and I do not have pets. The grounds have been stored frozen, but please refrain from purchasing if you are sensitive to items stored at home. *Please avoid storing the grounds sealed in a Ziploc bag. This can trap moisture and cause mold. Color: Brown Type: Recycled Material Sales Method: Single item