Tupperware Brands, the company that revolutionized food storage decades ago, has filed for Chapter 11 bankruptcy protection.

The company plans to continue operating and will seek court approval for a sale, it said just before midnight on Tuesday.

The company is seeking bankruptcy protection amid growing struggles to revitalize its business.

Tupperware sales growth improved during the early days of the COVID-19 pandemic, but overall sales have been in steady decline since 2018 due to rising competition. And financial troubles have continued to pile up for the Orlando, Florida, company.