Which is the best type of graph to show the number of red grapes and the number of green grapes in several cups?

A bar graph is the best type of graph to show the number of red grapes and green grapes in several cups. This format allows for clear comparisons between the two types of grapes across different cups, making it easy to visualize the differences in quantity. Each cup can be represented on the x-axis, while the y-axis can display the number of grapes, with separate bars for red and green grapes.