A liquid consuming apparatus comprising: a liquid container comprising: a liquid chamber configured to store liquid; a liquid supply opening configured to supply the liquid from the liquid chamber to an exterior of the liquid chamber; a movable member positioned in the liquid chamber and having a detection portion which, when the movable member moves, moves in a moving path; and a restriction member configured to restrict movement of the movable member in the liquid chamber; a liquid consuming portion configured to consume liquid supplied from the liquid container via the liquid supply opening; a release member configured to release the movable member from restriction by the restriction member; a detector configured to output a detection signal based on presence or absence of the detection portion in a detection position in the moving path; and a controller; characterized in that: the controller is configured to: measure, based on the detection signal output from the detector, a physical quantity, based on which a velocity of the detection portion moving in the moving path can be specified; and determine whether the physical quantity is within a threshold range. a liquid container comprising: a liquid chamber configured to store liquid; a liquid supply opening configured to supply the liquid from the liquid chamber to an exterior of the liquid chamber; a movable member positioned in the liquid chamber and having a detection portion which, when the movable member moves, moves in a moving path; and a restriction member configured to restrict movement of the movable member in the liquid chamber; a liquid chamber configured to store liquid; a liquid supply opening configured to supply the liquid from the liquid chamber to an exterior of the liquid chamber; a movable member positioned in the liquid chamber and having a detection portion which, when the movable member moves, moves in a moving path; and a restriction member configured to restrict movement of the movable member in the liquid chamber; a liquid consuming portion configured to consume liquid supplied from the liquid container via the liquid supply opening; a release member configured to release the movable member from restriction by the restriction member; a detector configured to output a detection signal based on presence or absence of the detection portion in a detection position in the moving path; and a controller; characterized in that: the controller is configured to: measure, based on the detection signal output from the detector, a physical quantity, based on which a velocity of the detection portion moving in the moving path can be specified; and determine whether the physical quantity is within a threshold range. the controller is configured to: measure, based on the detection signal output from the detector, a physical quantity, based on which a velocity of the detection portion moving in the moving path can be specified; and determine whether the physical quantity is within a threshold range. measure, based on the detection signal output from the detector, a physical quantity, based on which a velocity of the detection portion moving in the moving path can be specified; and determine whether the physical quantity is within a threshold range.