The bowls are vegan, can hold hot soup for up to five hours and have a shelf life of 15 months, according to the company. They are marketed to be used at picnics, parties and corporate events.

The U.S. Department of Agriculture announced Thursday Blount Fine Foods recalled about 6,690 pounds of soup, because it may be contaminatd with plastic.

The product, “Panera Bread at Home Chicken Tortilla Soup,” is sold in a 16-oz plastic bowl and has a “Use by Date” of 07/05/2019, with a lot code of 042619-3V or 04619-4V.

The total melamine excretion in urine for 12 hours was 8.35 micrograms per liter after consuming soup from a melamine bowl, compared to only 1.31 micrograms after sipping soup from ceramic bowls.

The bowls are vegan, can hold hot soup for up to five hours and have a shelf life of 15 months, according to the company. They are marketed to be used at picnics, parties and corporate events.