100% Natural Products. It is flammable and can be used indoors or outdoors for campfire, barbeque charcoal, grilled meat charcoal. alcohol & party , gothic (Horror), barbeque & cooking, grill accessories as all our products are unique & tested many times to ensure that our skull charcoal are of superior quality , non-toxic and harmless and have a good combustion effect. Naturally flammable without chemicals. Skulls are safe to use in a wood fire or gas fire places and fine pits. It is non-toxic tasteless barbeque special charcoal. If you do not move it during the burning process, it will shape well and you can get a white skull. These are perfect for fire pit or fire place and make a great decoration.