Talks are planned in a dispute over payments to Black Country refuse workers who want a bigger wage for extra duties in Christmas week.
Sandwell Council has offered £900 each but unions are holding out for £1,300, claiming the demand is not excessive.
The payments would cover four extra days over the festive period, but none of the bank holidays.
Negotiations between the Transport and General Workers union (T&G) and the council are set to continue on Tuesday.
The workers, who get paid on average £22,000 a year, have said the extra money is not enough because of the extra work they are expected to handle.
Derek Hesom, T&G regional organiser, said refuse collectors were handling a triple workload during Christmas week and they would lose holiday entitlement.
But the councillor in charge of refuse collection said the demands made were unfair and unrealistic.
Councillor Mahmoob Hussain said no one would be forced to work over the festive period.