when i was down at the local hardware store,something caught my eye 100% natural coconut shell charcoal on the package it says burns hotter,no smoke,virtualy no ash and you only need a few,this might be a old thing but i have never seen them before .they come 20 in a package i used 7 and the heat was very hot for 4-5 hours..has any body else used it ....cheers davey