What can these be used for? There may be differences in color, chips, unremoved dirt, or cracks. Coins are for size reference and are not included with the product. Sea pottery, etc., is disinfected with bleach and dried in the sun. We carefully package items, but there may be cracks or chips during shipping. We may reuse empty food boxes for shipping. If items can be combined for shipping: 2 items purchased: 100 yen off 3 items purchased: 200 yen off We do not accept returns. Thank you for your understanding. Thank you for looking.