the lower part of the left is a wine pot, and right part is person who put his tongue out to drink or taste the wine.
The bronze script of the character is
the left part is the wine pot, and the right is a person who holds the pot and try to drink the wine with his tongue.
The small seal script of the character is
which is similar to the bronze script on the left part, the right part is same as a person who is drinking with an open mouth, but the tongue is not seen.
The clerical script of the character is
which is changed a lot, no similarity to the old scripts. The left part actually means Eat (Post 190), not a wine pot anymore. In ancient times, character Eat - 食, could mean Drink sometimes. Right part means Owe, not a person who is drinking. However, the character Owe - 欠 (Post 314), is a person who is open his mouth for yawning, which is some similarity to open mouth to drink.
The reason why it changed so much to is unknown.
The song typeface for traditional character is
The song typeface for traditional character is
飲
very similar to the clerical script.
The song typeface for simplified character is
饮
Its pinyin is Yin3.