we save any kind of glass jar for that purpose. There are a lot of things that don't come in glass jars anymore. But, you do run across a few and they hold probably at least a pint or up to a quart.
My mother brings chili to DH (nobody else here really likes it) every couple of weeks. She always brings a recycled glass jar that we can throw away. I send soup to the in-laws in jars too. If I don't have any recycled ones, I use canning jars.
Honestly, I don't think I've ever put soup or chili in anything but a jar.
My mother saves ever butter bowl and jar she gets because SIL takes anything left every time we eat there. She recycles the food into all kinds of things--soup, casseroles, etc.