Shirakiku Ramune soda
This Ramune soda is extremely popular in Japan. Its a refreshing drink that is great for summertime. The method opening and drinking is part of the experience. A marble traps the pressure inside the bottle, and popping it inside is required for opening the bottle. Inside, the marble stays in the top area while the indents on one side act as stoppers so that the marble does not block the flow of the drink. Drinking Ramune properly involves keeping that marble away from the neck, which some people (for good reason) treat as a game of sorts. Imported from Japan for your drinking pleasure!