Abstract: A lid for an airtight container has a rim part for sealing to the container and plural locking flap handles extending from the rim part and rotating between open and locked positions. Each handle has a locking protrusion for locking to the container in its locked position, and a film hinge with an outer surface that smoothly curves continuously into an upper surface of the rim part of the lid, in the open position of the handle. The film hinge has an elastic hinge part that extends by a predetermined length to disperse an impact generated when the handle is locked to the container and the elastic hinge part is folded as the handle is moved from its open to its locked position.

Abstract: Disclosed herein is a lid for airtight containers. The lid according to the present invention includes a plurality of locking flap handles, which are coupled to a lid body so as to be rotatable, and each of which has a locking protrusion to be locked to a locking depression formed in the outer edge of the upper end of a container body. The locking flap handles are connected to the lid body by respective film hinges. The film hinge includes an elastic hinge part, which is continuous with the upper surface of the lid without having a stepped portion and is curved outwards at a predetermined curvature, and a connection part, which connects the elastic hinge part to the locking flap handle. The connection part extends a predetermined length to disperse an impact generated when the locking flap handle is locked to the container body.