How can I automatically zip a group of files into multiple zip files (say, 2mb in size for each file), and that each zip file is a stand-alone zip file? (i.e. not mult-volume zip files, that you can't lost any one of the files, otherwise you can't unzip)

Is there any tools available to do so? Actually I just need to group the files into many groups, 2mb each etc, zipped or not zipped doesn't matter

thx!