Fill-level indicator for liquid containers

A removable fill-level indicator device for a liquid container, comprising:

• a stop member configured to rest on a rim of an opening of the container,
• a buoyant member positioned below the stop member and operatively coupled to the stop member;
• and
• a recessed portion associated with the stop member, the recessed portion being configured to permit introduction of liquid into the container through the opening;
• and
• wherein the recessed portion comprises a plurality of elements extending downwards from the stop member and laterally towards each other, the plurality of elements operatively coupled to the buoyant member,
• wherein the buoyant member is configured to rise in response to a rising liquid level within the container and cause an upward movement of the stop member to provide a visible indication that the liquid has reached a predetermined fill level, and wherein the stop member and recessed portion are dimensioned to permit liquid to flow into the container during a filling operation,
• wherein the recessed portion extends downward from the stop member and is configured to receive a pouring aid,
• wherein the recessed portion provides clearance that allows liquid to be introduced into the container while the fill-level indicator device remains positioned in place,
• wherein the recessed portion, in combination with the stop member and the buoyant member, is dimensioned to permit fluid flow into the container during the filling operation, and
• wherein the upward movement of the stop member causes at least a portion of the stop member to rise above the rim of the container opening.