I have several pucks of Tabac soap (just in case) but have never purchased the bowl. I just put the puck in a Pyrex bowl, but the fit is less than ideal. I am getting towards the end of my first puck and am considering purchasing one in the bowl for a better fit. How tight it the fit with the ceramic bowl? I have looked at pictures and some look like a really snug fit and other times is seems there is a decent gap. I am thinking of just grating my next puck into the bowl, but that can have its own issues. Thanks for any input.