Courage found in alcoholic container (6)

I believe the answer is:

bottle

I'm a little stuck... Click here to teach me more about this clue!

This clue might be a double definition.

'courage' is the first definition.
(bottle can mean courage)

'alcoholic container' is the second definition.
'bottle' can be an answer for 'container' (bottle is a kind of container). I'm unsure of the 'alcoholic' bit.

'found in' acts as a link.

Can you help me to learn more?

(Other definitions for bottle that I've seen before include "Heart" , "beer found in this?" , "Nebuchadnezzar?" , "Glass or plastic container" , "Nerve (sl.)" .)

I've seen this clue in The Telegraph.

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