Abstract: A dental cleaner material comprises as a main component an aqueous solution containing 0.1 to 2.0% by weight of ethylenediaminetetraacetic acid or at least one of its alkali metal salts. The cleaner material is gelled by the addition of a carboxyvinyl polymer, carboxymethylcellulose or sodium carboxymethylcellulose as a raiser in viscosity showing thixotropy, further contains 0.01 to 0.3% by weight fo a p-hydroxybenzoic acid ester as an antibacterial agent, and is regulated to pH of 7.0.+-.0.5.

Abstract: A fixed volume discharge device adapted to be mounted to a container, and having a first chamber communicating with the interior of the container and a second chamber communicating with the atmosphere, the first chamber including a narrow opening through which a liquid or a powder stored in the container flows into the first chamber when the container is downwardly inclined, and the second chamber communicating with the first chamber through holes provided in a partition wall between the first and the second chambers below the narrow opening so that the liquid or the powder trapped within the first chamber flow into the second chamber through the holes when the container is returned in its normal attitude.