Celtic and Rangers will have a different jersey sponsor next season after the Parkhead club signed a three-year deal with Magners.
The cider brand will replace Tennent's Lager as the club's main sponsor when that deal expires at the end of the season.
Celtic chief executive Peter Lawwell said: "On behalf of everyone at Celtic, I am delighted to welcome Magners as the club's new shirt sponsor.
"This partnership is magnificent news, not only for Celtic but also for Scottish football. We are proud to be successfully leading Scottish football at home and in Europe."
The deal with Magners means that it will be the first time since 1999 that Celtic and Rangers have not shared the same jersey sponsor.