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 13 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 AAKRON LINE WILL NOT BE LIABLE FOR ANY BREAKAGE CLAIMS