Volumetrically Proportionate means that the shape of the objects remains the same, but their size increases or decreases proportionally.
In the case of the Discovery Toys Measure Up Cups, it means that each cup is a scaled-down version of the others. They all have the same shape, but their sizes increase in a specific ratio, allowing for accurate measurements.
Essentially, it’s like looking at a photo and then enlarging it. The picture gets bigger, but the shapes of the objects within it stay the same.
Imagine the smallest cup is 1 scoop of ice cream. The next bigger cup is 2 scoops, the next is 4 scoops, and so on.
If you stack the 1-scoop cup and the 2-scoop cup, you have a total of 3 scoops.
If you take the 4-scoop cup and remove the 1-scoop cup, you have 3 scoops left.
The same for the cups!
This is how volumetrically proportionate cups help us add and subtract volumes. The size difference between the cups is consistent, making it easy to calculate how much more or less one cup holds compared to another.
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