They sell candles that are aimed at the survival and other markets that melt at high temperatures. I carry mine in a Ziploc bag but have never had them melt. One of them is not straight any more as it bent while stored in the kit when it was very hot. The candles that are in cans might be another option as I think they are high temp wax in their make up also if stored upright there would not be any problem any way.