To dissolve a generated gas into water without scattering in the air when the gas is to be dissolved into the water using a gas generating agent which comes into contact with or reacts with the water to generate the gas in a short time.
Using a lid or an inner lid for sealing a container such as a PET bottle, a gas-generating lid or an inner lid is prepared, where the gas generating agent coming into contact with the water to generate hydrogen or the like is fixed or stored in the internal space of the lid or the inner lid. After the lid or the inner lid is tightly put on the container containing the water to prevent the water and the gas generating agent from coming into contact with each other, the water is brought into contact with the gas generating agent. This method is effective for a hydrogen generating agent with rapid gas generation speed such as calcium hydrate as a hydrogen gas generating agent.
MIYAWAKI KOJI
FUJINAGA YOSHIKAZU
