Drinks like beer, malt liquor, wine, and hard liquor contain alcohol. Alcohol is the ingredient that gets you drunk, according to the National Institutes of Health (NIH).
Hard liquor—such as whiskey, rum, or gin—has more alcohol in it than beer, malt liquor, or wine.
These drink sizes have about the same amount of alcohol in them:
1 ½ ounces of hard liquor
5 ounces of wine
8 ounces of malt liquor
12 ounces of beer
A little goes a long way.