Abstract: A processing device receives a multitude of measurements from an orientation sensor. The orientation sensor is mounted to a container. A determination is made, from the multitude of measurements, that the container is in an angular position where a composite weight of the container and contents of the container bear down on at least one weight sensor. The at least one weight sensor is mounted to the container. At least three readings of the composite weight are taken from the at least one weight sensor. A validation is made that each of the at least readings of the composite weight are: (1) within a minimum value and a maximum value; and (2) are within a difference of less than a predetermined amount to each other. In response to the validating, a composite weight value based on the at least three readings of the composite weight is stored.

Abstract: A hydration monitor comprises a housing and an attachment mechanism. The housing comprises a processing unit, a power source adapter, weight sensor(s), orientation sensor(s), data interface(s), and a memory. The weight sensor(s) measure a composite weight comprising a container weight and a liquid weight. The orientation sensor(s) measure the orientation of the container relative to the weight sensor. The memory contains instructions to cause the processing unit to calculate a volume of liquid in the container using the composite weight when the container orientation is in a measurable orientation. The data interface communicates data to at least one external device. The external device may include a hydration monitoring application. The attachment mechanism attaches the housing to the container.