Using these Vietri Regalia champagne glasses is a breeze. Just fill them up with your favorite champagne or sparkling wine and enjoy. When it comes to cleaning, always hand wash them. Avoid using abrasive sponges or harsh chemicals as they can damage the 14 - karat gold hand - painted details. After washing, dry them gently with a soft cloth. Store them in a safe place, preferably in a padded cabinet or a wine glass rack, to prevent any accidental breakage.