My leftovers are not normally canned. My wife never cans her worlds-greatest Chicken Matzo Ball Soup (though perhaps she should).
Originally Posted by
CastIron
I've had great success with the cheap Ziploc screw top containers. Most of the plastic tubs required additional wrap or sealing to be leakproof, but these never have.

+1. Cheap and good. Available at King Soopers, Safeway and Albertsons here. They work as well and are a lot cheaper than anything else mentioned. Come in at least two sizes and you can buy 30 for the price of a Sigg. If I leave a dirty one on my bag for a week and it gets too gnarly I just toss it out with no regret. I've got yogurt and fruit in one today, a bunch of BBQ sauce from Brothers in another today. BBQ sauce was upside down when I got to work - no leaks at all.