What type of font are you looking for? I've seen radically differing types, as in some religions, baptism is done by sprinkling water on a baby's head, whereas in others, full immersion of children or adults is performed. Still others are quite elaborate, with golden oxen and such. You might be able to create one for yourself using simple primitives or perhaps by rescaling a birdbath or swimming pool model ... something with the same general shape of what you have in mind.