这家初创公司与当地一家包装公司合作，由他们负责产品的包装工作。

The startup works with local ___co-packers to handle their product packaging.

这家化妆品公司与专业的包装商合作，以高效生产他们的新产品。

The cosmetics company worked with professional ___co-packers to efficiently manufacture their new products.