Container fill level measurement and management

A content fill level sensor, including:

• a transmitter located in a container cover that is configured to engage an opening of a container;
• a waveguide extending from the transmitter such that the waveguide includes a distal end that is configured to be located within an interior of the container when the container cover engages the container, wherein the waveguide includes a chamber that extends from the transmitter to the distal end and the waveguide is configured to guide an ultrasonic sound signal emitted by the transmitter down the chamber and exit out of the chamber towards a surface of a fill content included in the container;
• a receiver located in the container cover that is configured to engage the opening of the container and the receiver is configured to receive the signal emitted by the transmitter and reflected within the container;
• an accelerometer included in the content fill level sensor;
• a data storage included in the content fill level sensor;
• and
• a processor included in the content fill level sensor, wherein the processor is configured to analyze a filtered version of the signal received by the receiver.