Microwaveable food storage container with freshness indicator and steam vent

摘要

A microwaveable food storage container including a unitary base having a generally planar bottom portion and a sidewall extending generally upwardly therefrom, the sidewall of the base including base sealing means for cooperating with a lid to form a seal; an injection-molded lid provided with resettable freshness indicator means at least in part integrally formed with the lid; a resealable vent preferably with a hinged vent panel integrally formed in the lid; and lid sealing means for cooperating with the base sealing means to form an annular interference-fit seal when the lid and base are joined. Preferably the base is an injection-molded base formed from a polypropylene resin such as isotactic polypropylene. In other embodiments, the polypropylene resin composition comprises a propylene/ethylene copolymer. Preferably, the base has a chamfered guide shoulder as well as an inwardly projecting annular sealing protuberance at the upper sidewall to define a notch wherein a sealing band in the lid is wedged when the base and lid are joined to form a closed container.