About 300 workers at the Molson Coors plant in Toronto are on strike.
They hit the picket lines Thursday afternoon at the big brewery near the 401 and 427.
The company says that because negotiations have been ongoing for several months, they have been preparing a contingency plan.
VP of Corporate Affairs Gavin Thompson says customers should not notice any disruption with the plan in place.
Molson Coors has several plants across the country, including in Creemore, Ontario.