In the video, there is a cartoon dog sitting at a table with three glasses in front of him. The dog is holding a measuring cup in one hand and a bottle of milk in the other. He pours the milk into the glasses, one by one, until they are full. The dog then picks up a ruler and measures the amount of milk in each glass. After measuring, he drinks from the first glass and then drinks from the second glass. The dog then picks up the third glass and drinks from it. Finally, the dog drinks from the first glass again. The video ends with the dog sitting back in his chair, smiling.