The unionized Costco workers are on a contract that expires Jan. 31, according to their Teamsters representatives.

Members of the Teamsters union have authorized a strike against Costco on February 1 unless they reach a deal with the warehouse retailer before the current contract expires 31.

The Teamsters union said more than 18,000 Costo workers are set to strike: “The vote is a direct result of the company’s continued failure to bargain constructively and refusal to present a