MICROWAVEABLE FOOD STORAGE CONTAINER WITH FRESHNESS INDICATOR AND STEAM VENT

摘要

A microwaveable food storage container (10) including a unitary base (14) having a generally planar bottom portion (16) and a sidewall (18) extending generally upwardly therefrom, the sidewall of the base including base sealing means (23, 25, 27) for cooperating with a lid (12) to form a seal; an injection-molded lid provided with resettable freshness indicator means (54) at least in part integrally formed with the lid; a resealable vent (40) preferably with a hinged vent panel (42) integrally formed in the lid; and lid sealing means (46) for cooperating with the base sealing means (47) 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 (22) as well as an inwardly projecting annular sealing protuberance (23) at the upper sidewall to define a notch (25) wherein a sealing band (32) in the lid is wedged when the base and lid are joined to form a closed container.