The 4th series that can be achieved by Muden. The moment you open the cans pull tab, "Push! You can enjoy the feeling of "shwa" and the refreshing feeling of bubbles that are bouncing. Open the pull tab part on the top of the main unit to "push! "Shwaswa" and other realistic sounds make you feel like youre drinking a beer. There are also 3 types of special voices once every 30 times. This key chain toy can be enjoyed over and over again at the end of work.