The US brewing giant Molson Coors said it hoped to create new jobs at Aspall cider following its takeover.
The firm has bought the family-run Suffolk producer in what is believed to be a £40m deal.
Phil Whitehead, Molson Coors’ UK managing director, said all Aspall’s production would continue in Suffolk.
“Our intention is to continue to invest in the brand, the liquid, the manufacturing site and Suffolk – hopefully creating new jobs,” he said.
Aspall was founded in 1728 by Clement Chevallier and is based in the village of Aspall, just outside Debenham, where it employs 127 people under the direction of Clement’s descendents Barry and Henry Chevallier Guild.
Many people on BBC Suffolk’s Facebook page have expressed fears for the Aspall brands and production in Suffolk.
Lynn P Andrews wrote: “What a shame. I hope all the current staff will keep their jobs and production will remain in Suffolk.”
Molson Coors cited its 2011 purchase of Sharp’s Brewery of Cornwall, which produces Doom Bar beer, as evidence it would not be tampering with the taste of Aspall or moving production elsewhere.
Mr Whitehead said: “The reason that the products are successful is that it’s a tremendous cider. We would be foolish to change that.”
Barry and Henry Chevallier Guild will remain part of the operation as board advisors.
Henry Chevallier Guild, a director of the firm who will carry on working at Aspall, said he had visited Sharp’s in the village of Rock last year.
“That feeling that we got coming away from Rock was ‘This could really work and take Aspall to the next level’,” said Mr Chevallier Guild, a descendant of the firm’s founders.
“For us to continue expanding we need investment to ensure we can keep on making the liquid to the same quality and standard and we’re comfortable that’s going to happen.
“We can get the plant absolutely world-class.”