A method for detecting tampering with a stowage container (100, 200, 802) attachable to an underside of a seat in an aircraft, comprising: configuring the stowage container (100, 200, 802), which includes a tamper-evident device, the stowage container (100, 200, 802) comprising a container housing (106, 202) and a barrier (104, 206), wherein the barrier is attached to the container housing (106, 202) with a moveable hinge for being moved from a first closed position into a second open position and from the second open position back into the closed first position, wherein edges of the barrier (104, 206) overlap edges of the container housing (106, 202) to prevent access to an interior of the stowage container (100, 200, 802) between the container housing (106, 202) and the barrier (104, 206) when the barrier (104, 206) is in the first closed position; positioning the tamper-evident device, which includes an indicator positioned in a slot of the barrier and a post attached to, or formed as a part of, the container housing (106, 202), the post providing at least a portion of a retainer configured to releasably hold the indicator in a first closed state until the barrier is moved toward the second open position in which the indicator slides off the post and drops down toward or to a bottom portion of the slot under an influence of gravity, wherein the tamper-evident device is positioned such that the tamper-evident device is viewable from at least one predetermined eyepoint under an ambient light environment; configuring the tamper-evident device such that the indicator of the tamper-evident device is inaccessible from an exterior of the stowage container (100, 200, 802), wherein the tamper-evident device provides a distinct color contrast with the stowage container (100, 200, 802) and an indication that tampering has occurred; and visually examining the tamper-evident device to determine whether the indicator is the a first closed state or a second open state, wherein the indicator is maintained in the second open state upon the barrier moving from the second open position back to the first open position. configuring the stowage container (100, 200, 802), which includes a tamper-evident device, the stowage container (100, 200, 802) comprising a container housing (106, 202) and a barrier (104, 206), wherein the barrier is attached to the container housing (106, 202) with a moveable hinge for being moved from a first closed position into a second open position and from the second open position back into the closed first position, wherein edges of the barrier (104, 206) overlap edges of the container housing (106, 202) to prevent access to an interior of the stowage container (100, 200, 802) between the container housing (106, 202) and the barrier (104, 206) when the barrier (104, 206) is in the first closed position; positioning the tamper-evident device, which includes an indicator positioned in a slot of the barrier and a post attached to, or formed as a part of, the container housing (106, 202), the post providing at least a portion of a retainer configured to releasably hold the indicator in a first closed state until the barrier is moved toward the second open position in which the indicator slides off the post and drops down toward or to a bottom portion of the slot under an influence of gravity, wherein the tamper-evident device is positioned such that the tamper-evident device is viewable from at least one predetermined eyepoint under an ambient light environment; configuring the tamper-evident device such that the indicator of the tamper-evident device is inaccessible from an exterior of the stowage container (100, 200, 802), wherein the tamper-evident device provides a distinct color contrast with the stowage container (100, 200, 802) and an indication that tampering has occurred; and visually examining the tamper-evident device to determine whether the indicator is the a first closed state or a second open state, wherein the indicator is maintained in the second open state upon the barrier moving from the second open position back to the first open position.