More Heat with Less Waste. 48 million single-use “green” propane bottles end up in landfills each year. Ignik was founded to solve problems like this and enable you to heat, cook and survive in the outdoors with less waste. The Gas Growler is a safe, convenient, refillable, no-waste solution for heat in the outdoors. Portable, easy to use and packs the heating power of 5 green bottles in single tank. Also includes our heater/stove combo which means you now only need to carry one device for all your cooking and heating needs. Great for use during cold-weather camping, hunting, fishing, or tailgating activities.