The bottles were filled upside down, and pressure of the gas in the bottle forced the marble against the washer, sealing in the carbonation.
The bottle was pinched into a special shape, as can be seen in the photo to the left, to provide a chamber into which the marble was pushed to open the bottle. This prevented the marble from blocking the neck as the drink was poured.
Soon after its introduction, the bottle became extremely popular with the soft drink and brewing industries, mainly in Europe, Asia and Australasia, though some alcohol drinkers disdained the use of the bottle.
One etymology of the term codswallop originates from beer sold in Codd bottles, though this is generally dismissed as a folk etymology.