I`m not sure what you intend to do with it but, it will hold cement. I believe it is strong enough to fill right to the top with no problem. As a side note; once its full it will be very heavy and hard to move.
I WOULDN`T. it isn`t designed for that.
Large enough for my 9 month babe
Top outside diameter is 24".
Outside Dimentions Height: 11" Top - Diameter: 24" - Circumference: 75 1/2" Base - Diameter: 21" - Circumference: 66"
Yes, the product is suitable for that application.
Outside diameter of base is 21". Outside diameter of top is 24". Interior diameter of both top and bottom is slightly less.