I find my clients split evenly as to preferences between this the more traditional shape and the previous more “organic” one so whenever I get hold of good sized lumps of high quality wood I divide it between both shapes.

All designs have a common feature not obvious at first glance there are always six holes drawing fresh air up into the base of the chimney. This lets the wax burn completely so that there is no smoke to soot up the glass and absolutely minimal odour.