What is the Sunnah of drinking like?

Abū al-Mughīrah > al-Awzāʿī > al-Zuhrī > Anas b. Mālik

"He saw the Messenger of Allah ﷺ drinking milk, with Abu Bakr on his left and a Bedouin man on his right. The Prophet ﷺ gave the Bedouin his share of the milk, then he said, "The right, the right." – Sound Chain

أَخْبَرَنَا أَبُو الْمُغِيرَةِ حَدَّثَنَا الْأَوْزَاعِيُّ حَدَّثَنَا الزُّهْرِيُّ عَنْ أَنَسِ بْنِ مَالِكٍ

أَنَّهُ رَأَى رَسُولَ اللَّهِ ﷺ شَرِبَ لَبَنًا وَعَنْ يَسَارِهِ أَبُو بَكْرٍ وَعَنْ يَمِينِهِ رَجُلٌ أَعْرَابِيٌّ فَأَعْطَى الْأَعْرَابِيَّ فَضْلَهُ ثُمَّ قَالَ الْأَيْمَنَ فَالْأَيْمَنَ – إسناده صحيح