Not exactly food containers, but apparently, textiles release most of their microplastics after the first few washes [1]. So, the longer you wear a tshirt, the safer it becomes.
At the same time, some containers like Huskee cups literally start breaking down after a few years [1], so it’s not just microplastics, but you can see bigger chunks of plastic ending up in your food.
[1]: https://uk.help.huskee.co/en-US/what-does-end-of-life-cups-r...