Updated at: 05-08-2023 - By: John Lau

Have you ever wondered why there is a marble in your Japanese soda, or been curious about the unique bottle design?

The truth is, that small glass orb plays a significant role in maintaining the carbonation of your favorite fizzy drink.

In this article, we will delve into the fascinating history and mechanics behind these intriguing beverages – from their cholera-fighting origins to ingenious bottle sealing methods.

Get ready to immerse yourself in a bubbly journey through time!

The Purpose of the Marble in Japanese Soda

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The marble in Japanese soda serves multiple purposes, including historical significance, carbonation retention, and bottle sealing mechanism.

Historical background

Ramune soda originated as a sweet lemon-lime medical beverage, created with the intention to help fight cholera. The unique feature of this drink is the glass marble used for sealing its bottle.

This inventive approach started from the Hiram Codd bottle design in 19th century England. He developed this innovative seal mechanism for carbonated drinks, utilizing a marble and special stopper.

Japanese manufacturers adopted this method, making Ramune an iconic part of their culture over time. Today, Ramune stands as an integral element during summer festivals across Japan.

So much so that it’s hard to imagine these events without bottles of fizzy Ramune adding to the festive cheer!

Carbonation retention

The placement of a marble in Ramune soda serves an important purpose – carbonation retention. The marble acts as a seal that helps keep the carbonation inside the bottle, ensuring that the drink stays fizzy and refreshing for a longer period of time.

When you push down on the special stopper, it releases the gas from within, causing the drink to bubble up and come alive with fizziness.

This unique feature not only adds to the novelty of opening a Ramune bottle but also keeps its carbonated goodness intact until you’re ready to enjoy every sip.

Whether you’re sipping on this Japanese soda during summer festivals or simply quenching your thirst at home, rest assured that the marble inside ensures that each sip is as effervescent as possible.

Bottle sealing mechanism

The bottle sealing mechanism of Ramune soda is what makes it unique and keeps the carbonation inside. The marble in the bottle acts as a seal, preventing the fizz from escaping and giving the drink a longer shelf life.

When you open a Ramune bottle, you use a special stopper to push down on the marble, causing it to drop into a chamber within the neck of the bottle.

This releases the carbonation and creates that satisfying fizzing sound when you pour it into a glass.

But don’t worry about choking on the marble – it stays safely inside the bottle after opening.

So next time you enjoy a refreshing Ramune soda, appreciate this clever bottle sealing mechanism that keeps every sip fizzy and delicious.

The Unique Bottle Design of Ramune

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Ramune stands out with its unique bottle design known as the Codd-neck design, featuring a glass marble and special stopper that serves as both a seal and a way to retain carbonation.

Codd-neck design

The Codd-neck design is a unique feature of Ramune soda bottles. It was inspired by the Hiram Codd bottle design, which used a marble to seal carbonated drinks in the late 19th century.

This design features a glass marble and a special stopper that creates an airtight seal, keeping the carbonation inside the bottle for longer shelf life.

When you open a Ramune bottle, you push down on the stopper with force to release the gas and drink up all that refreshing fizziness.

The Codd-neck design adds to the novelty and charm of Ramune soda, making it stand out from other beverage packaging in Japanese culture.

Glass bottle construction

Ramune soda stands out not just for its unique flavor and packaging, but also for its distinct glass bottle construction.

These bottles are specially designed with a codd-neck design, which features a marble sealed at the top.

The glass bottle is carefully crafted to hold the carbonated drink and keep it fresh for longer periods of time.

With this innovative design, Ramune becomes more than just a beverage; it becomes an experience that combines taste and tradition in one refreshing package.

Opening a Ramune Bottle

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How to open the bottle

To open a Ramune bottle and enjoy the unique experience, follow these simple steps:

  • Hold the bottle with one hand, making sure your thumb is on the top of the plunger.
  • Use your other hand to firmly press down on the plunger until you hear a “pop” sound.
  • Once you hear the pop, remove your hand from the plunger and let it go back to its original position.
  • Place your thumb over the opening of the bottle to prevent any spillage.
  • Gently tilt the bottle towards you and slowly pour the soda into a glass or drink straight from the bottle if preferred.

Enjoying the unique experience

Drinking a Ramune soda is more than just quenching your thirst – it’s an experience like no other. As you hold the distinct glass bottle, your excitement builds knowing that there’s a marble inside waiting to be released.

With a quick press on the special stopper, you’ll feel the carbonation fizz up and hear that satisfying pop sound as the drink comes alive.

Savor each sip as you enjoy the refreshing taste of this iconic Japanese beverage.

The unique packaging and cultural traditions surrounding Ramune make it a novelty drink worth trying, especially if you’re looking for something different to enjoy during summer festivals or when in need of an energizing boost.


In conclusion, the marble in Japanese soda serves multiple purposes. It not only retains carbonation and acts as a bottle sealing mechanism but also adds a unique design element to Ramune bottles.

The experience of opening a Ramune bottle and watching the marble release the fizz is an enjoyable and novel aspect of Japanese soda culture.

So next time you come across a bottle with a marble inside, don’t be afraid to give it a try and experience this fun and refreshing tradition for yourself!