cooler

n. That which cools, or abates heat or excitement. [ 1913 Webster ]

If acid things were used only as coolers, they would not be so proper in this case. Arbuthnot. [ 1913 Webster ]

2. Anything in or by which liquids or other things are cooled, as an ice chest, a vessel for ice water, etc. [ 1913 Webster ]

3. An alcoholic beverage containing liquor or wine plus a carbonated beverage, usually served with ice. [ PJC ]

4. jail; -- usually used in the form the cooler. [ slang ] [ PJC ]

4. an air conditioner. [ PJC ]