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gravitas_shortage t1_irewsyf wrote

Stanley themselves say their bottle will keep things hot for 24 hours. The laws of physics are harsh - the vacuum flask cannot contain a perfect vacuum to eliminate conduction and convection, it cannot be contained magnetically to prevent the plastic from transmitting some heat, heat is lost when you open the bottle, and no material blocks radiation perfectly.

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Loobeensky OP t1_irexl79 wrote

I wonder if I've missed something then because they claim that the 1,9 l version should keep the contents hot for more than 40 hours 🤔 But as Matthias said below and as I suspected, it's probably the whole deal of opening and closing the bottle.

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gravitas_shortage t1_irezk54 wrote

You're absolutely right, that model does say 45h here: https://eu.stanley1913.com/products/classic-legendary-bottle-2-0-qt and I'm wrong.

In that case, I'd return it for a replacement or refund. And since Stanley has a very bad reputation for customer service: don't take any shit if they try to wriggle out on some fine print defining hot as 'hotter than Connecticut in a snow blizzard', their site says 'keep coffee hot for 45h' and coffee has a well-accepted requirement for proper hotness. Take a screenshot of the web page, just in case.

Edit: I'd measure the time it stays uncapped first, as pvtdirtpusher said. I'd still argue /some/ amount of pouring out over time is expected from normal use.

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Loobeensky OP t1_irfuugq wrote

Yeah, I'd say their promised 45h should include some pouring to even be a relevant piece of info about the product; on the other hand, it'd be a bit naïve to expect a company not to brag about the efficiency even if it's achievable only in optimal conditions.

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