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[–] 11 points 1 day ago (1 child)

With ice to keep the drink inside cold for longer, a 40 ounce tumbler is really a 30 ounce tumbler at best.

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  • [–] 9 points 1 day ago (2 children)

    ...What do you think happens to ice when it melts?

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  • [–] 13 points 1 day ago (1 child)
  • [+] -8 points 1 day ago (3 children)

    ...No, no it doesn't. Ice displaces its own volume in water. This is basic physics.

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  • [–] 19 points 1 day ago (1 child)

    It displaces its own mass, it has more volume as ice

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  • [–] 7 points 1 day ago

    About 10% more. A little less actually but 10% is an easy number.

    If the 40oz container is filled with 30oz of water and the rest is filled such that the ice is forced into the 40oz volume by the lid we'll first have a total "volume" of 40oz of combined ice and water.

    When the ice melts it will take up 10% less volume. Staying with oz for simplicity, we'll consider it a measure of volume in this case. So, the final amount of water in the container once all the ice turns to liquid water is 10% less than the volume the ice originally occupied. So 10 oz reduces down to 9oz of occupied volume.

    So the total loss off volume as compared to not putting ice in is 1oz of final water in the containers steady state condition.

    It's pretty negligible even in the case of 1/4 of the container being filled with ice.

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  • [–] 5 points 1 day ago

    If the ice is floating the body of water it joins doesn't decrease in volume but the ice itself does. In a bottle if you fill it with a mix of ice and water you will still have less water after it melts than if you just filled the whole bottle with water.

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  • [–] 5 points 1 day ago (1 child)

    If a tumbler has anything other than water in it, dilution.

    My point was to do with one reason cup sizes in the U.S. are larger: Americans typically use more ice than people in other countries. It's not there because it's water, it's there to keep the drink cold.

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  • [–] -1 points 1 day ago (1 child)

    Ice is water in solid form, when it melts it becomes water again. Ice displaces its own volume in water. If you have 30 fl oz of water and 10 fl oz of ice, and you leave it there for a while, you will have 40 fl oz of water.

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