Walk through Amos, verse by verse, with the great Bible Commentaries of Matthew Henry (1662 - 1714) & Adam Clarke (1760 - 1832)
6:6
That drink wine in bowls, and anoint themselves with the chief ointments: but they are not grieved for the affliction of Joseph. KJV
{and drink wine in vials; and with best ointment they were anointed; and in nothing they had compassion on the sorrow, either defouling, of Joseph.} Wycliffe's Bible
That drink wine in bowls - Perhaps the costliness of the drinking vessels, more than the quantity drank, is that which is here reprehended by the prophet.