Phoenix-based U-Haul is unveiling a sustainable one-pound propane cylinder that will appeal to conservationists and save money for campers.

The refillable cylinders are being rolled out in California and soon will be available nationwide at U-Haul-owned stores that supply propane and U-Haul neighborhood dealers who receive propane certification.

“With the one-pound refillables, U-Haul is acting as a responsible corporate citizen by providing a green solution to a growing problem, and doing so at a significant savings to the customer,” U-Haul chief sustainability scientist Allan Yang said. “It is very unsafe to refill disposables, but our new cylinders are made for exactly that.

Refillable one-pound propane cylinders can be used to fuel portable stoves, heaters and lanterns. U-Haul refillables are available in two shapes: a tall, skinny tank and a shorter, stout tank.

A new U-Haul refillable is only $11.95, includes a full cylinder, and can be used countless times over the life of its 12-year certification. Refills are just $1.95.

Comparatively, disposables can cost anywhere from $4 to $7 in California with 80 percent of the purchase going toward the canister.

Once the product launches nationwide, U-Haul locations for purchasing/refilling these cylinders will be searchable via uhaul.com/propane.

U-Haul began selling propane in 1984 and became one of the largest U.S. retailers of propane within a few years.