Storing leftover paint

Mason jars are good for keeping bits of paint for touch ups, lets you see the colour easily, and the re-sealable rubber keeps the paint fresh. The one problem is that glass breaks when it falls and can mess up a floor pretty good. I haven’t found anything else free or cheap to do the job, and would be interested if you think of anything. I’m out of good paint space too, but i think I’ll just junk the colours that I’ll never end up using.