Skip to main content

Superior Solutions For Professional Wine, Cider, Mead & Spirit Making

About Flextank

Affordable. Efficient. Production.

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.

  • Cost effective – Reduced barrel costs, labor, space and time. Higher revenue.
  • Sustainable – Lifetime guarantee. Eliminate extensive cleaning, water and chemical use.
  • Efficient – Easier to move, store, stack and clean. Increased productivity.
  • Controllable – Breathe like a barrel.
  • Award-Winning – Hundreds of craft beverage makers have won industry awards using Flextank.
  • Proven – Over 25 years, 95% of all Flextanks are still in use by thousands of operations.

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.

The Flextank vessels were engineered to provide higher production capability in less space. This production efficiency helps winemakers, cidermakers and craft beverage makers boost the capacity of their barrel rooms, reduce bottle costs and increase revenue.

Flextanks are manufactured with the highest quality FDA and European Food Safety Authority-approved, North American resins.

Flextanks are produced by SmaK Plastics, the parent company of well-known industry brands. The company is based in Vancouver, Washington with product dealers around the world.

Distribution Outlets in:

Vancouver, WA

United States





France, Austria, Czech Republic, Croatia, Hungary, Slovenia, Serbia, Slovakia, Romania
Greece, Cyprus
Canada, BC, ON, Quebec
Chile, Brazil, Peru, Argentina

How are Flextanks made?

Produced in Vancouver, WA, the bodies of each vessel are made through the process of rotational molding whereby powdered resin is loaded into a steel or aluminum mold, which is then rotated on two axes as it is heated in an oven. The resin melts and coats the inside of the mold while it ‘cooks’ in the oven. Following removal from the oven, the mold continues to rotate while it cools and the resin solidifies. As the mold cools, some shrinkage occurs that allows the finished vessel to be removed from the mold. Metal inserts may be molded into the vessel as required to affix accessories, such as valve flanges. Flextank valve flanges require a force in excess of one ton to tear them out of the vessel. What does this mean? A much stronger, longer lasting product.

Why can’t all polyethylene vessels, like IBCs, be used for premium beverage making?

Providing the required permeability for beverage making is what makes Flextanks unique. There are many vessels/tanks on the market that are made of polyethylene. However, not all vessels made of this material are created equal in the world of winemaking. Flextanks have been carefully engineered with special attention given to the selection and blend of the resin that is used, the surface area to volume ratio, wall thickness and configuration of each vessel. It is these details that make Flextanks ideal for use in beverage making.

How does the oxygen permeability of Flextank compare to that of traditional oak barrels?

Flextank’s maturation weight vessels are designed to have a similar oxygen permeation rate to that of a typical second-use wine barrel, when used at a nominal cellar temperature of approximately 55 degrees Fahrenheit (13 degrees Celsius). Flextank’s ‘heavyweight’ vessels are designed to act like neutral wine barrels. Heavyweight vessels are simply heavier vessels with thicker walls. Oxygen permeation rates are about half that of the maturation vessels and are comparable to “neutral” barrels.

Do Flextank vessels affect the flavor of my wine, cider, mead, spirits or food?


Flextanks are made from carefully selected quality materials and are used by thousands of wineries, craft beverage makers, and food production operations for fermentation, storage, transport, These leading worldwide beverage makers rely on Flextank for efficient, controllable, stackable, sustainable production.

Modern catalyst technology has produced food-grade polyolefins that are extremely stable polymers. Polyethylenes from this group are widely used in the food and beverage industry in manufacturing processes, transport and storage.

Flextank vs. Oak Barrels / Stainless Steel Tanks

Enhanced Durability

Produced using extremely durable polyethylene, Flextanks are built to last up to 20 years – that’s more than double the life of oak barrels! The vessels are manufactured by SmaK Plastics in the US using the highest quality North American resins approved by the US Food and Drug Administration and the European Food Safety Authority.

Space Savings

Flextanks are configured for high-efficiency use of space in professional wine, cider, mead and related beverage-making industries. The variety of tank options makes it possible to double the production capacity of your barrel room.

Cost & Labor Savings

Second only to the cost of equipment, one of the biggest financial challenges for beverage producers is the cost of labor. With Flextanks, capping off barrels is eliminated and transporting them and cleaning are made increasingly less time consuming lowering your cost of labor dramatically.

Micro Oxygenation & Flavor Consistency Control

Scientifically designed to assist in oxygen management, Flextank options include both heavyweight and lightweight maturation vessels which simulate the micro oxygenation process within both neutral and two-year-old oak barrels. The resulting hygienic environment makes “clean” tasting wines that preserved the flavors of the fruit with the a heightened ability to precisely control the flavor with Flextank’s high-quality oak adjuncts.

How does it work?

Oxygen enters each Flextank through the oxygen-permeable polyethylene walls and is driven across the tank wall by the partial pressure differential between the wine and the atmosphere. Upon permeating into the wine the oxygen is used up by the complex chemical changes that occur during maturation. Flextank’s maturation weight vessels are designed to have a similar oxygen permeation rate to that of a typical second year wine barrel, when used at a nominal cellar temperature of approximately 13 degrees Celsius (55 degrees Fahrenheit). Flextank’s ‘heavyweight’ vessels are designed with thicker walls to act like neutral wine barrels. Oxygen permeation rates are about half that of the maturation vessels and are comparable to “neutral” barrels.

Environmental Impact

Flextank aims to keep its environmental impact as minimal as possible. In line with that aim, all of our polyethylene vessels and metal accessories are fully recyclable. Flextanks also require much less water for effective cleaning than similar capacity vessels made from wood or stainless steel.

SEO Tools byWeb Design and Development | Roundbox