After trying several different designs I like this type of clip the best because it has a low profile, uses little filament and is fast to print. Since there doesn't seem to be such a clip for DAS FILAMENT spools I designed one myself from scratch.
There is a regular version and a version with an additional nose. While the nose might slightly increase the possibility of removing the clip by accident it also makes removing the clip on purpose much more convenient. Therefore I highly recommend this version.