It represents the cleansing of the soul of original sin.
The shell is an ancient symbol of baptism and is often used during baptism to scoop the water from the baptismal font. The three drops of water represent the Trinity: Father, Son and Holy Spirit into whom we are baptized.
Font
The Baptism font is what holds the water for baptisms in the Catholic Church.
Roman Catholic AnswerThe Font is a receptacle for baptismal or holy water. In the early Church, when Baptism by immersion was more common, the fonts were very large and below ground level.
Do you mean holy water? if so...holy water is used in baptism to represent the holy spirit. This is used because when Christians believe in Jesus, the holy spirit enters them.
It is where the person is dipped three times In three names of The Holy Trinity.
A religious font is used for the ritual of holy water, typically found in churches. It is often a basin or small pool where water is blessed by a priest and can be used by worshippers for various religious ceremonies or blessings.
Roman Catholic AnswerA number of things hold Holy Water in a Church. A large dispenser usually has a quantity of Holy Water for the Faithful to fill their bottles to take home, this is called a Holy Water Urn. A small bucket used by the priest to carry Holy Water around the Church while sprinkling the congregation is called Holy Water Bucket, and the small holders at the door, that you can dip your fingers in are called Holy Water Fonts, the Baptismal Font holds Holy Water used in Baptism.
The Rite of Baptism in most Christian churches involves Holy (blessed) Water and Holy (blessed) Water. Some denominations use springs or streams, or even a bathtub filled with water--these are blessed by the clergy just before the Baptism. Full immersion (indoor or outdoor) for adult Baptism is practiced in many denominations; other denominations use a Baptismal font (especially for infant Baptism) or sprinkling of Holy Water on the person's forehead.For example, a disabled child or bedridden adult would not be denied Baptism just because they cannot be dunked or immersed in water. The Rite of Baptism is not to exclude, but to include people into the Family of God.
font
there has been a cross or a crusifix in the water
Roman Catholic AnswerCatholics make use of a font for baptismal or holy water. In the early Church when baptism was frequently given to adults, the font would often be very large and below ground level. As baptism by pouring became the rule, fonts became smaller and higher.