Container (1) of indicator liquid - containing indicator liquids for dental practice, to indicate caries or dental plaque, in which the container: - comprises a plastic plate (2) with a chamber (3) recessed therein to contain a liquid indicator and - comprises a coating film / sheet (8) which can be attached to the plastic plate (2), in which the indicator liquid container (1) - comprises a small rod, a brush with rod shape or a rod-shaped applicator (5) and - a groove (4) provided in the plastic plate (2) for receiving the small rod, the rod-shaped brush or the applicator (5), in the that the small rod, the rod-shaped brush or the applicator (5, 14) do not reach beyond a lateral edge of the plastic plate (2) in the closed position, - in which an open medium (6) it is provided in the recessed chamber (3), - in which a recessed space (28) is provided around the slot (4) in the plastic plate (2) and is suitable to allow access of the tip of a finger and the tip of a thumb or another finger to this space (28), and - in which a The downwardly directed edge (31) is provided along the outer edge of the plastic plate (2) and extends as far or further than the depth of the recesses (28, 29 and 30).Recipiente (1) de líquido indicador - que contiene unos líquidos indicadores para la práctica dental, para indicar caries o placa dental, en el que el recipiente: - comprende una placa de plástico (2) con una cámara (3) rebajada en la misma para contener un líquido indicador y - comprende una película/lámina (8) de recubrimiento que puede estar unida a la placa de plástico (2), en el que el recipiente (1) de líquido indicador - comprende una varilla pequeña, un cepillo con forma de varilla o un aplicador con forma de varilla (5) y - una ranura (4) prevista en la placa de plástico (2) para alojar la varilla pequeña, el cepillo con forma de varilla o el aplicador (5), en el que la varilla pequeña, el cepillo con forma de varilla o el aplicador (5, 14) no llegan más allá de un borde