After much browsing, I have decided for this pot. Every now and then it's ok to buy a supermarket or in a drugstore. Abe, who saw me always all made too small. This Rotho-pot is also something for large bottoms, ie, that (in boys), all other parts and fit in with nothing bib. My son sits down and whines like not that the pot is too small, what happened to us with his grandparents. So he remains seated and done his business. The wide rim prevents the bottom of the pot that the little outline the pot when you get up, because (at least that's with us so) that they are always right when standing with your feet on it and thus keep the pot on the ground - no sticking! :-) Absolute buy recommendation!
