Patent ID: 7954670

Claim:
A container system comprising: (a) a flexible container comprising: (i) a first flexible pocket; (ii) a second flexible pocket coupled to said first flexible pocket and sealed from fluid communication with said first flexible pocket; (iii) an inlet coupled to said first flexible pocket; (iv) a drain coupled to said first flexible pocket; and (v) a fill port coupled to said second flexible pocket; (b) a rigid frame provided in supporting engagement with said flexible container; (c) wherein said first flexible pocket is secured to and within said second flexible pocket along a seam which curves around said drain (d) wherein said second flexible pocket is configured such that as a fluid is provided through said fill port, said first flexible pocket collapses and said second flexible pocket remains expanded; (e) wherein said seam is located such that as said fluid is provided through said fill port, said fluid presses against said first flexible pocket, thereby forcing said first flexible pocket to evacuate a fluid through said drain; (f) wherein said seam comprises a substantially straight first seam and substantially straight second seam, wherein said first seam is non-parallel to said second seam; and (g) wherein said first seam extends from a first position below said drain to a second position above said drain and wherein said second seam extends from a third position below said drain to a fourth position above said drain.