Bottle that's cold swigged by wife the same age as us (5,7)
I believe the answer is:
dutch courage
'bottle' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for dutch courage that I've seen before include "Drunken bravado" , "False bravery from drinking alcohol" , "Bottle of drink?" , "Drunken swagger" , "Bravery induced by alcohol" .)