A lid that closes a mouth of a container is made of a material principally including a paper material. The lid includes a side wall that is fitted into the mouth of the container, and a top lid that is surrounded by the side wall. The top lid includes an inlet/outlet formation part that forms an inlet/outlet for an article stored in the container, and a temporary fixing part that temporarily fixes the inlet/outlet formation part to the top lid. This can achieve a lid that has satisfactory thermal insulation, can reduce leakage, is user-friendly, can reduce a manufacturing cost, and is conscious of environmental issues.

A lid that enables easy and hygienic opening and closing of a spout in a lid, is formed for opening and closing an open mouth part of a container, and has a top surface part formed so as to cover the open mouth part when the lid is closed. The top surface part includes a small lid piece and an opening part formed when the small lid piece is lifted, a joint part joined to one end part of a tab member is formed near a tip end of the small lid piece, and the tab member has a knob part formed at the other end part.

Embodiments herein relate to an ultrasonically weldable polymeric lid for a microwaveable polymeric container. In an embodiment, a lid for microwaveable containers can include a polymeric ring. The polymeric ring can define a central aperture having an inner diameter. The polymeric ring can also include a recessed shelf contacting the inner diameter of the central aperture and an ultrasonic bonding surface disposed to the outside of the recessed shelf. The lid can include a peelable film disposed on the recessed shelf and occluding the central aperture. The peelable film can be removably bonded to the recessed shelf, and can include a tab attached to an edge of the peelable film. In some cases the lid can contain substantially no metal content. Other embodiments are also included herein.