Gifts for Men, Custom Engraved Whiskey Glass with Cooling Stones & Elegant Wooden Box, Gift for Dad: Embossed UV printing is done on the glasses. It is long lasting & permanent. 2 Granite Cooling Stones are sent with the product. Name & initials are engraved on the wooden box & on the front part by laser engraving. Special Design Wooden Box is manufactured & assembled by handwork. For long-lasting use, it is recommended to wash the glass by hand. After the cooling stones are washed, they should be kept in the freezer for 2 hours & then added to the whiskey in the glass. Since it does not melt like ordinary ice, it does not dilute the whiskey & creates an elegant appearance in the glass. For your questions or special requests, please do not hesitate to contact with us. Gifts For Men, Custom Engraved Whiskey Glass With Cooling Stones & Elegant Wooden Box, Dad