Flash Fuel delivers an easy drinking and delicious craft coffee with the convenience of brewing it instantly. Flash Fuel is a blend of CHRC Instant and Micro-Ground which gives a full bodied and delicious drinking coffee - While the instant is completely water soluble, the micro-ground will leave a slight sediment in the bottom of the cup (similar to cowboy coffee). If you are feeling particularly adventurous, give the slurry a go, otherwise dispose of it.