Korev, St Austell Brewery’s lager, has been selected by Great Western Railway (GWR) for the modernised Night Riviera Sleeper service between Penzance and London Paddington.
Overnight customers can buy a 330ml can from the train’s recently-refreshed lounge bar.
Korev joins fellow St Austell Brewery brand Tribute, which is already available on GWR train services.
Julian Richards, GWR’s customer propositions manager, said: “We’re enormously proud to stock locally-sourced refreshments from west country food and drink producers on our trains. We’re delighted to be adding Korev – a quality Cornish beer – to our range.”