Ramune is widely known for the distinctive design of its glass bottle The bottles are made of glass and sealed with a glass marble. The marble is held in place by the pressure of the carbonation in the drink. To open the bottle, a device to push the marble inward is provided. The marble is pushed inside the neck of the bottle where it rattles around while drinking. Therefore, the drinks are sometimes called "marble soda" outside of Japan.
People trying Ramune for the first time sometimes find it difficult to drink, as it takes practice to learn to stop the marble from blocking the flow.
200 ml glass bottle