A package includes a base, a lid, and a locking mechanism. The locking mechanism includes an arm and a flexible member. The arm extends from the lid and has a first engaging structure. The member includes a flexible rib connected to a base floor, and a second engaging structure and a contact structure on a rib outer surface. The member flexes in response to a first force applied in a first direction to the contact structure and relaxes in response to absence of the first force. The member engages the first and second engaging structures based on the member being relaxed while the lid is closed. The member disengages the first and second engaging structures based on the member being flexed while the lid is closed. The lid may be opened based on applying a second force to the lid in a second direction while the member is flexed.

An assembly that includes a bucket; an arrangement for coupling a lid to the bucket without fully enclosing the bucket. The bucket can include a base portion that has a circular cross-sectional shape and an upper portion that has a non-circular cross-sectional shape.

A food container includes a box, a cover and a pair of locking wings. The box includes a main body and elastic engaging plates. The main body has a receiving space. The elastic engaging plates are arranged on opposite sides of the receiving space. Each elastic engaging plate includes an elastic arm and a clip. The cover includes a cover plate and engaging slots. The cover is positioned on the main body through the clip inserted in the engaging slot. The locking wings are pivotally coupled to the cover. Each locking wing rotates toward the box to press elastic arms. The elastic arms drive the clips to be disengaged from the engaging slots. Thus, the cover is separated from the box.

The container includes a base and a lid pivotally coupled to the base. The base includes a bottom wall and a peripheral wall, where a plurality of receptacles are defined in the peripheral wall. The peripheral wall is configured to be moved from a relaxed position to a flexed position by applying a first force to a first portion of the peripheral wall in a first direction and a second force to a second portion of the peripheral wall in a second direction. The lid includes a top wall and a plurality of projections. In the relaxed position, the lid is configured to engage the receptacles so as to retain the lid in a closed configuration. The container is configured to be moved from the closed configuration to an open configuration by moving the lid in a third direction while the peripheral wall is in the flexed position.