Smithfield Packing Co., Smithfield, VA , lays claim as the first to offer microwavable entrées in a self-venting package. “There is absolutely no hassle with these entrées,” enthuses Mark Willes, vice president prepared foods/retail. Available in July, Smithfield Premium Entrées use Darfresh® Heat’n Serve Package technology from Cryovac Div. Sealed Air (Duncan, SC) .