Anas used to breathe twice or thrice in the vessel (while drinking) and used to say that the Prophet; used to take three breaths while drinking.  

كَانَ أَنَسٌ يَتَنَفَّسُ فِي الإِنَاءِ مَرَّتَيْنِ أَوْ ثَلاَثًا وَزَعَمَ أَنَّ النَّبِيَّ ﷺ كَانَ يَتَنَفَّسُ ثَلاَثًا