Soap flakes are a bath product that only appear in the episode "Pet Sitter Pat."
They are flakes of soap that come in an aquamarine box with yellow triangles on the upper left and bottom right of the box. It also contains lavender squares and the ingredients on the middle sides and the product's name transcribed in red letters on the front side. Combination of the flakes with water will create pink foam.
Role in episode
When trying to get Gary to take his bath while babysitting him, Patrick combines this product with the water of a running hose to force his bathtime, much to Gary's disapproval.