The maker of a popular kitchen has been hit with a class action lawsuit alleging it falsely labeled products that exposed people to microplastics.

According to AboutLawsuits.com, Ziploc plastic bags were marketed as “microwave safe” and “suitable for freezer use,” when using them in these ways could potentially release dangerous microplastics.

The lawsuit by a California woman claims some of the bags made with polyethylene and polypropylene release microplastics under extreme temperatures created by freezers or microwaves. Microplastics are small plastic pieces of less than 5 millimeters that can be harmful to humans, oceans and aquatic life.

Microplastics have been linked to cognitive and behavioral issues, infertility and reproductive complications and cancer.

According to the suit, the product labeling creates a “reasonable impression that they are fit for use in the microwave and freezer” but adds, “In reality, these products are made from polyethylene and polypropylene — materials that scientific and medical evidence shows release microplastics when microwaved and frozen — making them fundamentally unfit for microwave and freezer use.”

Ziploc is owned by S.C. Johnson. The lawsuit specifically mentions several products:

• Ziploc Freezer Bags Pint/Small, Freezer Bags Quart/Medium and Freezer Bags Gallon/Large

• Ziploc Slider Freezer Bags Quart/Medium

• Ziploc Slider Freezer Gallon/Large Bags

• Ziploc Slider Storage Bags Quart/Medium

• Ziploc Slider Storage Bags Gallon/Large

• Ziploc Containers