Same with the energy label of food. In the metric system:
Portion sizes of 65 gram in a 90 gram container. Then the label shows for 10 gram, portion size, and 100 grams. But not the actual weight of the container!
I mean, what 'portion' consists of 65/90th of a container? They know full well that the actual portion people consume $PRODUCT in is what is in the box.