Ecogrills are made from alder wood and alder charcoal. As they are a natural wood product they have a soft burn whilst naturally flavouring your food. Designed to be used anywhere: camping, caravanning, fishing, on the beach or simply in your own garden or outside space. No fluids or lighters required. We have medium size which has a burn time of around 2 hours or the large size which will burn for around 3 hours on average. No waste to get rid of - burns away to powder.