Autopot FlexiTank Pro The Revolution Refined: the FlexiTank Pro offers even greater scope for growing with AutoPot Watering Systems in extreme climes. The elegance of FlexiTank Pros reflective and light-tight skin is the embodiment of form and function combined. The FlexiTank Pros skin beautifully disguises an extremely rugged, fully collapsible design within. Concealed tank supports and internal capacity markings add neat edges to the proven, ultrastrong, ultra practical FlexiTank design.