The Complete Guide to Japan's Iconic Marble Soda
From the 1870s English invention to Japanese summer festivals — the full story of the world's most fun soda bottle. History, science, brands, flavors, and where to buy it in the US.
A 150-year-old soda with a marble in the bottle — here's how it became Japan's most iconic drink.
Ramune (ラムネ) is a Japanese carbonated soft drink famous for its unique Codd-neck bottle, sealed with a glass marble. The name comes from the English word "lemonade," and the drink has been a beloved part of Japanese culture since the 1870s. It is the quintessential Japanese soda — as iconic in Japan as cola is in America.
Today, Ramune is synonymous with Japanese summer festivals (matsuri). Every year, millions of bottles are sold during fireworks displays, temple festivals, and Obon celebrations. The satisfying pop of the marble dropping into the bottle is the soundtrack of Japanese summers. Vendors at festival stalls (yatai) sell ice-cold Ramune alongside takoyaki, yakisoba, and cotton candy — it's an experience that defines the season.
Beyond festivals, Ramune has become a global phenomenon through anime and manga. Characters are frequently shown drinking Ramune at summer festival scenes, and fans worldwide have grown curious about this mysterious marble-sealed bottle. In recent years, Ramune has also become a popular gift item and party drink in the US, appreciated for its unique opening ritual and clean, refreshing taste.
Hiram Codd invented the Codd-neck bottle in England in 1872 to seal carbonated drinks. The marble-and-gasket design was revolutionary — no caps or corks needed. British bottlers quickly adopted it for mineral water and lemonade.
Scottish pharmacist Alexander Cameron Sim introduced the drink to Japan. Japanese consumers loved the fizzy lemonade and the playful marble bottle. The word "lemonade" was adapted to "Ramune" (ラムネ) in katakana.
Ramune is now inseparable from Japanese matsuri culture. Multiple brands produce dozens of flavors. It's exported worldwide and has become a staple of anime, manga, and Japanese pop culture globally.
How does a glass marble keep soda fizzy for months? It's brilliant physics.
The bottle neck has a narrow chamber with a rubber gasket ring. A glass marble sits above the gasket. When the bottle is filled with carbonated liquid, the internal CO2 pressure pushes the marble upward, pressing it firmly against the gasket to create an airtight seal.
The carbonation pressure (typically 3-4 volumes of CO2) exerts constant upward force on the marble. Gravity and the pressure work together — the marble cannot fall because the gas pushes it up, and it cannot escape because the neck is narrower than the marble. The result is a self-sealing bottle that needs no cap.
Below the narrow neck, the bottle widens into a larger chamber. When you push the marble down, it drops into this chamber and rattles around while you drink. The narrow neck prevents the marble from blocking the opening or falling out. Two grooves on either side of the neck allow liquid to flow past the marble when pouring.
Ramune is carbonated to roughly 3.5 volumes of CO2 — similar to champagne but less aggressive than beer. This gives it fine, delicate bubbles that feel silky on the palate rather than harsh. The marble seal maintains this pressure consistently until you open it.
First time? Don't worry — it's easier than it looks. Follow these steps and you'll be fizzing in seconds.
Peel off the plastic shrink wrap around the bottle cap. Underneath, you'll see a plastic flipper cap and the marble visible through the glass neck. The flipper is the plunger you'll use to push the marble down.
Place the bottle on a flat surface. The plastic flipper cap is already hinged at the top — flip it up so it sits above the marble. Some brands include a separate plunger; if so, place it on top of the marble.
Using both thumbs, press down firmly on the plunger (or flipper). You'll feel resistance from the carbonation pressure, then a satisfying POP as the marble drops into the lower chamber. Hold for 2-3 seconds.
After the marble drops, the soda will fizz vigorously for a few seconds — like opening a shaken champagne bottle. Wait until the fizzing subsides before removing the plunger and drinking. This prevents overflow.
Once the fizzing has calmed, lift off the plunger. The marble will rattle freely in the lower chamber. Drink directly from the bottle — the marble stays in the bottom and won't block your mouth thanks to the neck grooves.
Chill the bottle before opening — cold soda holds carbonation better and fizz is more controlled. Never shake it first. Point the bottle away from others when pushing the marble down, just in case of a fizzy surprise.
Four major brands dominate the Ramune market. Here's how they stack up on flavor range, price, and US availability.
The most widely available brand in the US. Known for their 7-flavor combo packs and consistent quality. MIZUHO bottles have a classic design with reliable marble mechanisms. Flavors are well-balanced — not too sweet, not too artificial.
The largest Ramune producer in Japan with the widest flavor lineup — over 20 varieties including seasonal limited editions. Sangaria bottles are slightly larger (200ml vs 190ml). They also make a popular candy version. The go-to brand in Japan.
Japan's largest tea company also makes Ramune, and it shows — their version uses more natural ingredients and less artificial flavoring. Ito En Ramune has a cleaner, more refined taste. Harder to find in the US but worth seeking out.
A smaller, heritage brand that focuses on traditional Ramune recipes. Hatakeda's original flavor is considered the most authentic by Japanese purists — closer to what Sim brought to Japan in 1884. Limited US distribution but available online.
From the classic original to exotic limited editions — there's a Ramune for every palate.
Light lemon-lime with fine bubbles. The classic — tastes like a cross between Sprite and cream soda.
Sweet and fruity with a candy-like strawberry taste. One of the most popular flavors after original.
Japanese musk melon flavor — creamy, sweet, and distinctly Japanese. A must-try for first-timers.
Bold concord grape with a rich, jammy sweetness. Reminiscent of grape candy but less cloying.
Bright citrus with a refreshing tang. Lighter and more natural-tasting than Western orange sodas.
Delicate floral sweetness. Lychee Ramune captures the tropical fruit's unique perfume beautifully.
Green tea Ramune — earthy, slightly bitter, and uniquely Japanese. A modern twist on the classic.
Peach, mango, pineapple, cola, and seasonal flavors rotate through the year. Always something new to try.
Ramune is easier to find than you think. Whether you prefer shopping online or browsing store aisles, here are the best places to buy it in the US. Most options carry multiple brands and flavors, so you can stock up for parties or try different varieties.
Best selection of MIZUHO and Sangaria. Multi-packs with free shipping over $49. Prices from $1.71/bottle in combo packs.
Good variety of flavors and brands. Same-day delivery in select cities. Often has bundle deals on multi-packs.
In-store and online. Korean supermarket chain with a strong Japanese drinks section. Sangaria and MIZUHO usually in stock.
Widest brand selection including Sangaria, Ito En, and Hatakeda. Subscribe & Save available. Watch for shipping costs on glass bottles.
Looking for a curated selection? Check out the MIZUHO Ramune 7-Flavor Combo Pack — the best way to try all the popular flavors in one order.
Everything you wanted to know about Ramune
Join millions of people who've discovered Japan's most fun soda. Pop the marble, hear the fizz, taste the tradition.