The directory ~/Library/Containers has a size 39GB on my system. This is huge. I guess that the directory contains some files created by running various apps. So the more applications I use, the more is being stored within the directory. It thus seems to be a cache-like directory. Can I safely just delete it?
PS. It turned out that the majority of the space (37GB of 39GB) was taken up by files from a single app: CamWiz Webcam Recorder. But still, 2 GB are in the other directories and files, so I should be able to do a cleanup and delete most if not all of the files there.