Britvic has joined with Wincanton and Malcolm's Logistics to channel more of its drinks distribution into rail freight.
The initiative will take 50 lorries off the road per day and is expected to cut Britvic's greenhouse gas emissions by 3,285t per year.
The project involves moving one million bottles of Britvic brands such as Robinsons and Tango on to a rail route running from Daventry in the Midlands to Grangemouth and Mossend in Scotland.
"As a business, we're always looking for ways in which we can reduce our environmental impact. This rail project enables us to reduce fuel needs and deliver carbon savings and is exactly the sort of development that we are committed to making," said Britvic UK logistics director Clive Hooper.
Wincanton md Gordon Scott said: "Working together, we're able to utilise all of the space on the train in both directions, delivering both environmental and cost benefits."