Costco made a big change to its rotisserie chicken packaging. Shoppers hate it.

Costco is now bagging its wildly popular rotisserie chicken at some locations as the warehouse club looks to reduce the packaging and environmental cost of storing and transporting the $4.99 product in rigid plastic containers.

The retailer in March started swapping out its hard-plastic packaging with flexible plastic bags akin to what Walmart and Whole Foods use to package their rotisserie chickens. But shoppers have panned the bags, with some customers taking to social media to decry the grease and leaks that result from the new packaging. 

"Chicken juice spilled all over the trunk of our car," one person said on Reddit.