Mirror printing allows the full color imprint to show through to the inside of the glass  Made from soda lime glass. Hand wash only. Glasses are packaged in bubble wrapped sleeves, have cardboard dividers between each glass, and are packaged in heavy-duty cardboard cartons with 1/3” thick foam on the top, bottom, and all sides of the carton. This is our standard packaging for these glasses and there are no extra charges for these cartons.  The cartons are approved with UPS and if another carrier is chosen or changes are requested to the way they are packaged WE WILL NOT BE LIABLE FOR ANY BREAKAGE CLAIMS.