It's Time To Throw Out That Nasty Plastic Food Container If You See These Signs - Chowhound

alejandro piorun/Shutterstock There's no one correct answer to the question of how long plastic food containers last. Some sources say a year; Others say they can last up to 10 years. In any case, you can generally expect higher-quality brands like Tupperware to last longer. (Single-use containers are another story. As the name implies, they shouldn't be reused. These containers are usually marked with a…