In a new series of ads running on Canadian radio, the Pepsi Taste Challenge will challenge Coca-Cola's sense of humour by offering the Pepsi taste test to the Coca-Cola polar bears. But, where everyone remembers the original cola bears looking wholesome, happy and cuddly, in this latest series of radio ads their hackles are up and fur is flying when they try and tear apart a Pepsi Challenger for attempting to give them the Pepsi Taste Test.