Just done some googling. Looks like we were both right!
"On 18. November 1988 she gave birth to a male cub, the first polar bear cub of the zoo, that was born in Edinburgh and survived. The little polar bear was first baptised Wee Sweetie and became soon a star in Edinburgh. He even won more fame, when he became the mascot of Fox’s Glacier Mints, the leading, branded boiled mint in the UK, that has often been advertising with polar bears. As a result he got the name Minty. On 28 March 1990 he was moved to the Zoo Antwerp, where they again gave him a new name To-nuik. He died there unexpectedly on 19. June 1994. The cause of death couldn’t be determined."