Negotiations ahead of a Jan. 31 deadline are in full swing, but Costco Teamsters members voted on Sunday to head toward a strike. Reuters reports that 85% of the union's 18,000-plus members cast an "aye" vote to OK a strike—"a direct result of the company's continued failure to bargain constructively,

Costco Teamsters have approved a strike authorization, which could take effect soon if a new contract is not agreed to.

More than 18,000 Costco workers will be walking picket lines in less than two weeks if a labor dispute over wages and benefits is not resolved, according to the Teamsters union. Members voted by an 85% margin to authorize a strike when their current contract expires on Jan. 31, the union announced on Sunday.