Here's one more similar to the "font in the field". This one's from Penrhosllugwy, Anglesey. Yours is too small to be a font - too shallow and too small in diameter - imagine holding a screaming baby over that and not pouring water on your shoes!
Apparently stoups were removed from some churches in 16th century because they were considered "superstitious". One in Ludlow was found being used for a chicken water container in 1912 and reinstated in the church
Ooops picture's come out a bit big!