To provide a product that creates, on the surface of toilet water in a toilet bowl, a foam layer that suppresses water splashes, smells, and excretion noises that inevitably occur when a person is using a flush toilet for excretion. The present invention is a product that a person places in the toilet water in a toilet bowl before excretion. When the product, which is a mixture containing an alkaline substance, an acidic substance, and a surfactant, touches the water, a chemical reaction occurs, and a foam layer is created on the surface of the toilet water in the toilet bowl. The foam layer acts as a cushion that prevents water splashes etc. during excretion.
