The stem of one's wine glass is where you hold the glass. While not as famous as red wine for its health benefits, whites still possess many of the benefits if consumed in moderation. Tilt the glass 45 degrees and hold a white paper on the inside background. https://obedient-dolphin-kvlkb7.mystrikingly.com/blog/v-y-nen-luc-nay-hay-c-m-nh-n-h-ng-th-m-v-c-a-chung-b-ng-c-kh-u-giac-l-n