Three-litre champagne bottle (8)

I believe the answer is:

jeroboam

(Other definitions for jeroboam that I've seen before include "Large bottle of champagne; a Rome job (anag.)" , "Very large wine bottle named after old king of Israel" , "a lot of bottle?" , "'Large wine bottle, equal to four standard ones (8)'" , "Very large wine bottle named after Israeli king" .)

I've seen this clue in The Guardian.

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