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Loobeensky OP t1_irf1gua wrote

Reply to comment by gravitas_shortage in Stanley Legendary 1,9 l, water lukewarm after less than 30 hours by Loobeensky

Half the expected hotness time? I splurge to have the most effective thermos and that's what I get? What a disappointment.

(I'd be more than satisfied with 28–30h of properly hot water though.)

Now I wonder if their "indestructible" model performs better.

The expected temperature retention goes up with the size of the bottle, so I had big plans for this boi.

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gravitas_shortage t1_irf25st wrote

It can go two ways:

- Thermal mass is a major factor.

- The ratio of surface area to volume in a big bottle is much smaller, so the heat loss is much smaller.

Both ways can be true and act in opposite directions.

We need thermal measurements over time and volume, OP. For Science.

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gravitas_shortage t1_irf6hhz wrote

Also, I'm glad to report that I just checked, and it is not the case that there is a point of emptiness at which the larger bottle gets a smaller volume-to-area ratio than the smaller one. So, no need to get a smaller bottle depending on your expected consumption in order to preserve the heat. Whew.

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