Mentholin is another creation of Jaap Bes (De Kralingse
). It is a tobacco-free snuff aka snuff powder. It contains rice flour, boric acid and milksugar. It has a mixed, coarse grain and a decent taste. As far as I can judge, the smell and taste is different to the typical snuff powder, without being able to describe it. Sorry for that vague characterisation, but I do not know how to specify the taste here.
Since preferring snuff made of tobacco during the day, I use it in the morning or before going to bed where I do not need a nicotine rush. It is also very helpful if you need to get a good breath or need to get your nostrils clean.