Ramune is one of the oldest carbonated drinks in Japan, and is still enjoyed by many today, especially in the summertime. One of the most noticeable features of Ramune is that it is typically sold in glass bottles with a small marble sealed inside the neck. The name is actually derived from the English “lemonade” which was introduced to Japan from the United Kingdom in the 19th century. As the carbonated drink was developed before the invention of the modern bottlecap, the glass marble was added as a way of sealing the opening and keeping the fresh and fizzy.