Abstract: An optical path folding element includes a main body, a light absorption film layer and a matte structure. The main body has optical surface including an incident surface, a reflective surface and an emitting surface. A light enters into the optical folding element through the incident surface. The reflective surface reflects the light so as to change a traveling direction thereof. The light exits the optical folding element through the emitting surface. The light absorbing film layer is configured to reduce reflectance and provided adjacent to at least part of the optical surface, and the light absorbing film layer is in physical contact with the main body. The matte structure is disposed adjacent to at least part of the optical surface. The matte structure provides an undulating profile on a surface of the optical path folding element, and the matte structure is formed in one-piece with the main body.

Abstract: A container includes a base, a cover and an intermediate part. The base includes a first room and a first lip extends from the open top of the base. The cover includes a second room and a second lip extends from the open bottom of the cover. The intermediate part includes a third room and a third lip extends from the open top of the third room. The cover is mounted to the base with the intermediate part located between the cover and the base. The cover seals the base and the intermediate part by one-time pressing action. The base includes at least one plate which is engaged with a recess formed to the outside of the second lip of the cover to secure the cover to the base.

Abstract: A container includes a base and a cover which is snapped to the base. The cover includes at least one recess defined in lateral face thereof. The base includes a peripheral wall which has a reception area. The reception area includes a stop wall that extends from the peripheral wall, and a snapping member extends from the reception area and includes a protrusion. The at least one recess includes a wide top opening and a narrow bottom. The protrusion is shaped to be engaged with the at least one recess to connect the cover to the base. The base includes stop wall which reinforces the base strength to avoid from being deformed.