TapRack Refillable Propane SystemFinally, a small, refillable, propane bottle thats safe, easy, and saves you money. Green isnt good enough; blue is better. For years, propane has come in two main forms: large refillable cylinders, which are affordable to fill at service stations but too bulky for outdoor adventures, or small green bottles, which are convenient but create hazardous waste in landfills and nature. While some attempt to refill these small bottles at home, the process is