Me have comments from some Rezessenten that the opening or the Knockbox was too small, insecure and have let me plead for a long time whether I should grab not the larger container ("Motta Saucepan"). In daily use, this has proven to be completely unjustified: The 58mm filter holder can be beat wonderful and also for cleaning the ST with the brush, the opening is large enough. The volume is more than sufficient for the coffee consumption in private households (6-8 cups per day). Sure, after 4-5 days you have the container then empty times ... but since it is then already high at the time. Also, that the sheet to "sharp-edged" Anyway, I can not confirm: The plate thickness is not too small .... halt comparable eg with the WMF milk jug - and where you do not hurt yourself, too.