How Long Does An Unopened Growler Last in How To

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How Long Does An Unopened Growler Last. A glass growler keeps beer fresh for about 10 days. Growlers of beer will stay fresh for several days (some say up to 10 days) if left unopened.

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Additionally, the aluminum crowler can go to the beach or stadium where a glass growler can’t go. 2) the kind of caps they're using. How long does beer last in a growler?

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However, once the bottle is opened then the beer should be consumed within one or two weeks because air could replace the. Once opened, however, leftover beer will be flat within 36 hours at best. I opened mine around 3 weeks after buying it, and i would guess that there were a few days before that they filled and sealed it. Once opened, however, leftover beer will be flat within 36 hours at best.