Flextank advanced oxygen-permeable polyethylene tanks and hoppers are the leading wine, cider, spirits and craft beverage fermentation and storage solutions available worldwide. Wineries, cideries, spirits, mead and craft beverage, and food production plants worldwide rely on Flextank for efficient, controllable, sustainable production. Flextanks have been engineered with food-grade polyolefins. The Flextank vessels are individually designed to have a specific surface area-to-volume ratio and related wall thickness and configuration. These superior qualities make Flextanks ideal for craft beverage production – from stem to glass.