48 million single-use "green" propane bottles end up in landfills each year. By contrast, the refillable Ignik Gas Growler is more economical than single-use, 16-ounce bottles and more portable than traditional 20-lb propane tanks. Composed of a DOT-approved, welded steel propane tank, the Growler can be refilled at your local propane service stations, just the same as bigger tanks. The compact Ignik Gas Growler is ideal for situations that require portability, or when your space is limited such as camping, RVing, boating, fishing, tailgating, overland, etc. The Ignik Propane Gas Growler is a safe and convenient solution for portable heating and cooking that is both economical and more responsible than traditional alternatives. DOT-approved, 12-year valve certification, manufacturer's warranty. Available in three sizes: 3.8-Pound, 5-Pound, and 10-Pound.