Baptisms are wet by definition.
(See in Rochester Cathedral some years ago.)
The cones do not, I hasten to add, relate to concerns about 'Health and Safety' except with respect to the building work that was going on at the time when the picture was taken. However, it may only be a matter of time before somebody raises a concern about water temperature, slipping on splashes, getting chapped etc. and causes a working party to issue guidelines.