a plastic film fluid storage bag and dispensing spike assembly and method wherein the spike punctures the film and forms a fluid tight seal with the film surrounding a hole formed by the puncture . the film has no separate port structure for dispensing its contents . the spike may include a bulbous body with a sharpened tip at one end , an enlarged central portion , and a reduced diameter portion at its opposite end , adjacent a radially extending skirt . when seated , a seal is created around the smaller diameter portion of the body and against the skirt . the spike may alternatively include a cylindrical body with a slightly rounded point at one end and a radially extending skirt intermediate its ends . finally , the cylindrical body spike may be used without a skirt . in all cases , a fluid passage extends through the body .