Systems, apparatuses, and methods to seal a container are provided. An apparatus for securing a film to a container includes a body portion to house film and a sealing portion. The sealing portion includes a sealing volume for receiving a portion of the container, at least one heating element positioned within the sealing volume, and a sensor configured to sense when the portion of the container is at least partially within the sealing volume. A controller is configured to receive a sensor input from a sensor indicating that the portion of the container is at least partially within the sealing volume, and activate the at least one heating element based on the sensor input.

The disclosed methods of assembling a head-mounted display may include supporting a head-mounted display frame, moving the head-mounted display frame to align a frame coordinate system with a fixed optical coordinate system, holding a projector assembly, and moving the projector assembly to align a projected image with the fixed optical coordinate system. The aligned projector assembly may be secured to the aligned head-mounted display frame. Various other methods and systems are also disclosed.